Trimcal Body Measurement Kit – Includes Trimcal 4000 Body Fat Caliper + Body Measuring Tape for Weight Loss, Muscle Growth & Fitness Testing
*{box-sizing:border-box} body{margin:0;padding:0;background:#f9fafb;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;color:#111;line-height :1.55;-webkit-text-size-adjust:100%} .sr-only{position:absolute!important;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0} .hrm-pdp{max-width:1100px;margin:0 auto;padding:16px 12px 32px} .hrm-pdp a{color:#0b57d0;text-decoration:underline} .hrm-pdp a:focus,.hrm-pdp button:focus,.hrm-pdp [tabindex="0"]:focus{outline:3px solid #111;outline-offset:2px} .hrm-h1{font-size:1.5rem;font-weight:900;line-height:1.2;margin:0 0 4px 0;color:#111} .hrm-sub{font-size:.95rem;color:#374151;margin:0 0 14px 0} .hrm-grid{display:grid;grid-template-columns:1fr;gap:14px} @media(min-width:900px){.hrm-grid{grid-template-columns:1.25fr .75fr}} .hrm-card{border:2px solid #1f2937;border-radius:14px;background:#fff;padding:14px} .hrm-card h2{margin:0 0 10px 0;font-size:1.2rem;line-height:1.25;color:#111} .hrm-divider{height:1px;background:#1f2937;margin:16px 0} .hrm-list{padding-left:18px;margin:0 0 14px 0} .hrm-list li{margin-bottom:6px;line-height:1.4;font-size:.93rem;color:#111} .hrm-why-title{margin:0 0 10px 0;font-size:1rem;font-weight:800;background:#1f2937 !important;color:#fff !important;-webkit-text-fill-color:#fff !important;padding:8px 12px;border-radius:10px;letter-spacing:.02em} .hrm-pdp .hrm-card .hrm-why-title,.hrm-pdp h2.hrm-why-title{color:#fff !important;-webkit-text-fill-color:#fff !important;background:#1f2937 !important} details.hrm-acc{border:2px solid #1f2937;border-radius:14px;background:#FAFBFC;padding:12px} details.hrm-acc+details.hrm-acc{margin-top:12px} details.hrm-acc summary{cursor:pointer;font-weight:800;color:#111;background:#EEF2F6;padding:10px 12px;margin:-12px -12px 10px -12px;border-bottom:1px solid #1f2937;border-radius:12px 12px 0 0} details.hrm-acc summary::-webkit-details-marker{display:none} details.hrm-acc summary:before{content:"▸ "} details.hrm-acc[open] summary:before{content:"▾ "} .hrm-tablewrap{border:2px solid #1f2937;border-radius:14px;background:#fff;overflow:hidden} .hrm-table{border-collapse:collapse;width:100%} .hrm-table th,.hrm-table td{text-align:left;padding:8px 10px;border-bottom:1px solid #e9ecef;font-size:.88rem} .hrm-table th{background:#f3f4f6;font-weight:700;color:#374151;width:38%} .hrm-table td{color:#111} .hrm-pill-wrap{margin-top:12px} .hrm-pill-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px 12px;list-style:none!important;padding:0!important;margin:0!important} @media(max-width:720px){.hrm-pill-list{grid-template-columns:1fr}} .hrm-pill-list>li{list-style:none!important;position:relative} .hrm-pill-list>li::marker{content:""!important} .hrm-pill{display:block;width:100%;border:2px solid #1f2937;border-radius:999px;padding:10px 14px;background:#EEF2F6;color:#111;font-size:.98rem;line-height:1.25;text-align:left;cursor:pointer;font-family:inherit;list-style:none} .hrm-pill::-webkit-details-marker{display:none} .hrm-pill::marker{content:""} .hrm-pill:hover,.hrm-pill:focus{background:#d9e2ec} .hrm-pill-detail[open]>.hrm-pill{background:#1f2937;color:#fff} .hrm-pill-detail{list-style:none!important} .hrm-tooltip{margin-top:6px;background:#fff;border:2px solid #1f2937;border-radius:12px;padding:10px 12px;font-size:.88rem;line-height:1.45;color:#111} Trimcal Body Measurement Kit – Trimcal 4000 Body Fat Caliper + Body Measuring Tape Our best-selling body composition kit. Single-sided Trimcal 4000 caliper with dual-spring pressure + contoured 60-inch body measuring tape with wrap-and-lock design (inches + cm). Includes body fat % chart for men & women. 3 color combos. 131 reviews. By Sequoia Fitness. $18.47. [{"@context":"https://schema.org","@type":"Product","name":"Trimcal Body Measurement Kit – Trimcal 4000 Body Fat Caliper + Body Measuring Tape","brand":{"@type":"Brand","name":"Trimcal"},"manufacturer":{"@type":"Organization","name":"Sequoia Fitness"},"description":"Body composition kit including Trimcal 4000 single-sided skinfold caliper with dual-spring pressure and contoured 60-inch body measuring tape with wrap-and-lock design. Dual-scale inches and centimeters. Includes body fat percentage chart.","sku":"trimcal-kit-caliper-tape","offers":{"@type":"Offer","price":"18.47","priceCurrency":"USD","availability":"https://schema.org/InStock","itemCondition":"https://schema.org/NewCondition","url":"https://www.heartratemonitorsusa.com/products/sequoia-fat-caliper-myotape-bundle","seller":{"@type":"Organization","name":"Heart Rate Monitors USA"}},"aggregateRating":{"@type":"AggregateRating","ratingValue":"3.7","reviewCount":"131"}}, {"@context":"https://schema.org","@type":"FAQPage","mainEntity":[ {"@type":"Question","name":"What is included in the Trimcal Body Measurement Kit?","acceptedAnswer":{"@type":"Answer","text":"The kit includes the Trimcal 4000 single-sided body fat caliper with dual-spring tension, the Trimcal contoured body measuring tape (60 inches, dual-scale inches + cm, wrap-and-lock design), and a body fat percentage chart for men and women."}}, {"@type":"Question","name":"What is the difference between this kit and the Trimcal 4000 Caliper & Tape Set?","acceptedAnswer":{"@type":"Answer","text":"This Body Measurement Kit ($18.47) includes the single-sided Trimcal 4000 caliper with the contoured Trimcal Body Measuring Tape (60-inch, wrap-and-lock). The Caliper & Tape Set ($19.97) includes the dual-sided Trimcal 4000 caliper with a self-retracting tape with push-button lock. Both calipers use the same dual-spring mechanism."}}, {"@type":"Question","name":"Is this the same caliper as the standalone Trimcal 4000?","acceptedAnswer":{"@type":"Answer","text":"Yes. The caliper in this kit is the same Trimcal 4000 with dual-spring pressure, sliding scale, and body fat chart. The standalone caliper is $15.97; this kit adds the Trimcal Body Measuring Tape for $2.50 more."}}, {"@type":"Question","name":"What makes this kit different from generic caliper sets?","acceptedAnswer":{"@type":"Answer","text":"The Trimcal 4000 uses a dual-spring mechanism that delivers consistent jaw pressure automatically — generic calipers use a single spring, which means pressure varies with skinfold thickness. The contoured tape is designed to fit body curves and lock in place for accurate solo measurement, unlike flat hardware-store tapes."}}, {"@type":"Question","name":"Can I use the caliper with my left hand?","acceptedAnswer":{"@type":"Answer","text":"The caliper in this kit is single-sided — the scale is on one side only, which is optimized for right-handed use. Left-handed users can still use it but may find it slightly less convenient to read. If ambidextrous use is important, the Trimcal 4000 Caliper & Tape Set ($19.97) includes the dual-sided version with markings on both sides."}} ]}] Our Take: This is our best-selling body measurement kit for a reason — it hits the sweet spot of price, quality, and completeness. At $18.47, you're getting the same Trimcal 4000 caliper that's sold standalone for $15.97, plus the contoured Trimcal Body Measuring Tape for just $2.50 more. That tape isn't a generic hardware-store tape — it's shaped to wrap around body curves and lock in place, which matters when you're trying to get repeatable readings on your waist or thighs by yourself. The caliper itself uses the dual-spring mechanism that's the Trimcal's main selling point: consistent jaw pressure whether you're measuring a 10 mm skinfold or a 60 mm one. No clicking, no guessing how hard to squeeze. The sliding scale gives you a direct reading that you convert using the included body fat chart. The one thing to know: this kit includes the single-sided caliper. The scale markings are on one side, which works fine for right-handed users but is slightly less convenient for lefties. If you want the dual-sided (ambidextrous) caliper, the Caliper & Tape Set is $19.97. With 131 reviews, this kit has a long track record. The feedback is mostly positive — users love the value and the tape. The main criticism is that the caliper's spring tension can feel firm on the first few uses, and the included body fat chart is printed in small font. Both are real, but neither is a dealbreaker. Why you'd choose the Trimcal Body Measurement Kit Best-Seller — 131 Reviews, $18.47 Our most-reviewed body composition product. At $18.47, it's just $2.50 more than the standalone caliper ($15.97) — and you get the contoured body tape included. Available in 3 color combos: Black/Black, White/Black, and Black/White. Dual-Spring Consistent Pressure Two springs work together to maintain even jaw pressure throughout the measurement — one sets initial tension, the other keeps it uniform as you close. This eliminates the guesswork of how hard to squeeze, which is the biggest source of error with cheap single-spring calipers. You get repeatable readings every time. Contoured Body Tape — Wrap & Lock The Trimcal Body Measuring Tape is shaped to follow body curves — not a flat hardware tape. It wraps around your waist, hips, arms, thighs, chest, and calves, then locks in place so you can read the measurement hands-free. 60 inches / 150 cm with clear dual-scale markings. Push-button retraction for fast, tangle-free use. Dual-Scale Tape — Inches + Centimeters The tape shows both inches and centimeters on the same side, so you can use whichever unit you prefer without converting. Useful for military fitness testing (which often requires inches) and international training protocols (which use centimeters). Note: the tape doesn't start at zero — it begins at 1.75″ to compensate for the plastic hook mechanism. Measures Up to 80 mm Skinfold The caliper jaw opens to 80 mm (3.15″) — wide enough for virtually any body type. Many budget calipers max out at 40–50 mm, which is too narrow for thicker sites like the abdomen and thigh on larger individuals. Body Fat % Chart Included The included chart converts your skinfold measurements into an estimated body fat percentage, with separate tables for men and women. Uses standard multi-site protocols. While not a replacement for DEXA or hydrostatic testing, it provides a consistent baseline for tracking changes over time. No Batteries, No Apps, No Calibration Entirely manual. Works the same today, tomorrow, and five years from now. No firmware, no Bluetooth pairing, no subscriptions. Unlike body fat scales, readings aren't affected by hydration, time of day, or foot moisture. Pick it up and measure. 3 Color Combos Available Available in Black Caliper / Black Tape, White Caliper / Black Tape, and Black Caliper / White Tape. All combinations are the same product with the same specifications — choose whichever matches your style or makes the scale markings easiest for you to read. Who this kit is ideal for Anyone tracking fat loss or muscle gain — the caliper captures body fat changes while the tape captures circumference changes. Together, they tell a complete story that the scale alone can't. Personal trainers and coaches — fast, affordable baseline and progress tracking for clients at every session. The dual-tool setup covers body fat and measurements in under 5 minutes. Military and law enforcement — practice and prep tool for body composition tests and tape-test standards. Widely used by personnel and recruiters for informal pre-screening. Bodybuilders and physique competitors — tight monitoring of lean mass vs. fat during cuts, bulks, and contest prep. Home fitness and weight loss — straightforward, low-cost self-tracking that doesn't require equipment, subscriptions, or clinic visits. Pregnancy and postpartum — the contoured tape is well-suited for monitoring belly growth across trimesters and tracking recovery changes. You may prefer a different option if… You're left-handed — this kit includes the single-sided caliper (scale on one side only). The Caliper & Tape Set ($19.97) has the dual-sided (ambidextrous) version. You only want the caliper — the standalone Trimcal 4000 is $15.97 in Black or White. You only want a body tape — the Trimcal Body Measuring Tape is available separately. You need clinical-grade precision — Harpenden or Lange calipers ($200+) with certified jaw pressure are the medical/research standard. You want Bluetooth tracking — smart body tapes like the RENPHO sync measurements to an app, though they cost more and require batteries. Caliper — How It Works The Trimcal 4000 uses the skinfold method — a standard body fat estimation technique used worldwide by fitness professionals and military testers: Pinch a fold of skin + subcutaneous fat at a standard test site (triceps, abdomen, suprailiac, thigh, etc.) Close the caliper jaws — the dual-spring mechanism applies consistent pressure automatically Read the measurement on the sliding scale Convert using the included body fat % chart (separate tables for men and women) Measure each site 2–3 times and average for best accuracy Note: This kit includes the single-sided caliper — the scale is on one side, optimized for right-handed grip. Both left-handed and right-handed users can use it, but lefties may find the dual-sided version (in the Caliper & Tape Set) more convenient. Tape — How It Works Contoured design — shaped to follow body curves, not a flat construction tape Wrap and lock — tape locks in place around the body part for hands-free reading Push-button retraction — retracts smoothly with one hand, no tangling Dual-scale — inches on one side, centimeters on the other (60 in / 150 cm) Note: tape does not begin at zero — starts at 1.75″ to compensate for the plastic hook mechanism, ensuring accurate measurement Common sites: waist, hips, chest, upper arms, thighs, calves, neck Best Practices — Accurate Results Measure on the right side of the body (standard convention) Take each measurement 2–3 times and average the results Let the skinfold return to normal between measurements Measure at the same time of day — morning, before eating, is ideal Have the same person measure each time (if using a partner) Track trends over weeks and months, not individual readings For the tape: keep it snug but not tight — you should be able to fit one finger underneath Common 3-site protocol: chest, abdomen, thigh (men) or triceps, suprailiac, thigh (women) What's in the Box Trimcal 4000 single-sided skinfold caliper Trimcal contoured body measuring tape (60 in / 150 cm) Body fat percentage chart (men & women) Available in 3 colors: Black/Black, White/Black, Black/White Also Available from Trimcal Trimcal 4000 Caliper Only — $15.97 (Black or White) — same single-sided caliper, no tape Trimcal 4000 Caliper & Tape Set (Dual-Sided) — $19.97 — dual-sided (ambidextrous) caliper + self-retracting tape with push-button lock Trimcal Body Measuring Tape — contoured tape sold separately All Body Fat Calipers & Measurement — full selection at HRM USA Trimcal Body Measurement Kit Specifications Technical specifications for the Trimcal Body Measurement Kit Product Name Trimcal Body Measurement Kit Brand Trimcal (Sequoia Fitness) Includes Trimcal 4000 caliper + Trimcal Body Measuring Tape + body fat % chart Caliper Type Single-sided skinfold caliper (scale on one side) Caliper Mechanism Dual-spring consistent pressure (no click mechanism) Caliper Range Up to 80 mm (3.15″) skinfold thickness Caliper Grip Ergonomic pistol grip — one-handed operation Tape Design Contoured body tape with wrap-and-lock, push-button retraction Tape Length 60 inches / 150 cm Tape Scale Dual — inches + centimeters Tape Material Flexible, durable vinyl Tape Start Offset 1.75″ (compensates for hook mechanism) Included Guide Body fat % chart — separate tables for men & women Power Source None — fully manual, no batteries Bluetooth / App No Colors Available Black/Black, White/Black, Black/White Reviews 131 reviews Manufacturer Sequoia Fitness Price $18.47 Which Trimcal Kit Is Right for You? Three options — same caliper mechanism, different configurations. Comparison of Trimcal product options Feature Caliper Only Body Measurement Kit Caliper & Tape Set Price $15.97 $18.47 $19.97 Caliper Sides Single-sided Single-sided Dual-sided (ambidextrous) Dual-Spring Mechanism ✔ ✔ ✔ 80mm Range ✔ ✔ ✔ Body Fat Chart ✔ ✔ ✔ Tape Included ✘ ✔ — Contoured body tape ✔ — Self-retracting tape Tape Type — Wrap-and-lock, contoured Push-button lock, retractable Tape Scale — Inches + cm (dual) Inches + cm Best For Caliper-only users who already own a tape Best value — complete kit at lowest price with tape Left-handed users or those who want ambidextrous caliper Trimcal Body Measurement Kit — Frequently Asked Questions What's included in the Trimcal Body Measurement Kit? The kit includes three things: the Trimcal 4000 single-sided body fat caliper with dual-spring pressure, the Trimcal contoured body measuring tape (60 inches / 150 cm, dual-scale, wrap-and-lock with push-button retraction), and a body fat percentage chart with separate tables for men and women. Available in 3 color combos. What's the difference between this kit ($18.47) and the Caliper & Tape Set ($19.97)? Two differences. First, this kit includes the single-sided caliper (scale on one side, optimized for right-handed use), while the Caliper & Tape Set includes the dual-sided caliper (readable from both sides, ambidextrous). Second, this kit uses the contoured Trimcal Body Measuring Tape with wrap-and-lock, while the other set uses a self-retracting tape with push-button lock. Both calipers use the same dual-spring mechanism, same 80 mm range, same body fat chart. If you're right-handed, this kit is the better value at $1.50 less. Is this the same caliper as the standalone Trimcal 4000? Yes — identical caliper. Same dual-spring mechanism, same 80 mm jaw range, same sliding scale, same body fat chart. The standalone Trimcal 4000 is $15.97 without a tape. This kit adds the contoured body measuring tape for $2.50 more. Can left-handed people use this caliper? You can, but it's less convenient. The single-sided caliper has scale markings on one side only, which is oriented for right-handed grip and reading. Left-handed users will either need to read at an angle or switch the caliper between hands. If ambidextrous use matters to you, the Caliper & Tape Set ($19.97) has the dual-sided version with markings on both sides. How accurate is skinfold testing compared to DEXA or body fat scales? With consistent technique, skinfold calipers are generally within 3–5% of DEXA scans. For tracking changes over time — which is what most fitness users care about — calipers are often more reliable than bioelectrical impedance scales, which can swing 3–5% in a single day based on hydration, meals, exercise, and time of day. The key is consistency: same sites, same technique, same person measuring, same time of day. The Trimcal's dual-spring mechanism helps by eliminating variable pressure as a source of error. Can I measure myself without a partner? Yes for most sites. The caliper's pistol grip is designed for one-handed use — your other hand pinches the skinfold. Common self-measurable sites include triceps, abdomen, suprailiac (hip), and thigh. The subscapular (upper back) site is easier with a partner. The tape's wrap-and-lock design is specifically built for solo circumference measurements. Why doesn't the tape start at zero? The tape starts at 1.75 inches to account for the plastic hook mechanism. This offset ensures that when the hook catches on the tape during a wrap-around measurement, the reading you see is the actual circumference — not inflated by the hook's length. This is by design, not a defect. What do the reviews say? With 131 reviews, the feedback is mixed-to-positive. Users consistently praise the value, the tape quality, and the convenience of the kit. The most common criticisms: the caliper's spring tension can feel firm (especially on the first few uses), the body fat chart is printed in small font, and some users find it hard to use the caliper on themselves. These are fair points — the spring does loosen slightly with use, and self-measurement takes practice. A partner makes caliper use easier, but most common sites can be done solo with some practice. How often should I measure? Every 2–4 weeks is ideal for most fitness goals. Body composition changes slowly, and measuring more often creates noise that hides real trends. Always measure at the same time of day (morning, before eating), at the same sites, with the same technique. Log your numbers and focus on the trend over months — not any single measurement. Is this good for military body fat testing prep? Yes — this is one of our most popular kits among military personnel and recruiters. The tape is ideal for practicing the DoD circumference-based tape test (neck, waist, and hips), and the caliper lets you cross-check with skinfold measurements. However, official military assessments use specific protocols and authorized equipment — check with your unit for exact requirements. This kit is widely used for informal pre-screening and personal tracking between official tests. Need help choosing between the Trimcal Body Measurement Kit, Caliper & Tape Set, or Caliper Only? Call us at 1-800-403-8285 or 215-259-2700, or email [email protected].
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