Daily calorie targets for every goal
See estimated resting energy, maintenance calories, a weight-loss target, and a gradual weight-gain target together. These are included in the free calculator.
BODY FAT, CALORIES, AND MACROS IN ONE WORKFLOW
Measure body composition. Plan what to eat.
Caliper Cal turns physical skinfold measurements into estimated body fat, lean mass, maintenance calories, weight-loss or gain targets, and daily protein, fat, and carbohydrate goals. It connects a disciplined Jackson-Pollock assessment to practical nutrition starting points you can adjust using real progress.
Available now for Android. Start with the free calculator, then unlock Pro once if you need trainer and advanced tracking tools.
FROM THE CALIPER TO THE KITCHEN
More useful than a body-fat percentage alone.
Caliper Cal connects consistent skinfold measurement with practical nutrition planning. Estimate body composition, calculate energy needs from lean mass, and get calorie and macro starting points for your current goal.
Protein, fat, and carbohydrate goals
Each calorie target includes a complete macro breakdown in grams, giving you a practical starting point for planning daily intake.
Lean-mass-based energy estimates
Caliper Cal estimates lean mass from your skinfold assessment and uses it in the Katch-McArdle resting-energy equation before applying your selected activity level.
Protocol-specific measurement guidance
Each skinfold site includes male and female reference artwork, anatomical terminology, landmark instructions, fold direction, and caliper placement.
Three rounds with automatic medians
Pro accepts three readings at every site and uses the median, reducing the influence of one unusually high or low pinch while preserving the original readings.
Separate client histories
Pro keeps each client’s measurements and trends in a distinct profile, giving trainers a practical field-assessment workflow without mixing records.
Private, manageable records
History is stored locally. Delete a measurement, a profile, or all stored data from Settings. Pro can export readable profiles and measurements as JSON.
A lifetime Pro option
Free includes both protocols, guidance, one profile, and the latest three displayed results. Pro adds the complete history, client tools, median workflow, export, and removes ads with one purchase.
CALORIE AND MACRO PROJECTIONS
Start with your lean mass, not a generic guess.
Caliper Cal uses estimated lean body mass in the Katch-McArdle equation to calculate resting energy. Choose the activity level that best reflects your week, then review daily targets for losing, maintaining, or gaining weight.
Every goal includes protein, fat, and carbohydrate targets in grams. Use them as an informed starting point, compare average intake and body weight for two to four weeks, and adjust gradually from what actually happens.
Explore the calorie and macro calculatorResting energy
A lean-mass-based estimate using the Katch-McArdle equation.
Maintenance calories
Resting energy adjusted by your selected weekly activity level.
Lose, maintain, or gain
Three daily calorie starting points shown together for comparison.
Complete macro breakdown
Daily protein, fat, and carbohydrate targets in grams for each goal.
WHO IT IS FOR
Useful for your own goals. Structured for client work.
Caliper Cal shows how the measurement, body-composition estimate, calorie projection, and macro breakdown connect. The result is understandable, repeatable, and easier to put into practice.
FOR INDIVIDUALS
Turn a check-in into a practical nutrition starting point.
- See calories for losing, maintaining, and gaining weight
- Get daily protein, fat, and carbohydrate targets
- Use illustrated guidance while measuring
- Track body-composition changes without creating an account
- Adjust estimates using real intake and weight trends
FOR TRAINERS
Connect repeatable assessments to clearer client guidance.
- Give clients goal-specific calorie and macro starting points
- Create separate named client profiles
- Record three rounds and calculate site medians automatically
- Retain complete assessment history
- Export readable client and measurement data when needed
THE CALCULATION CHAIN
Every result has a traceable path.
- 1
Select the correct Jackson-Pollock protocol
Male and female profiles use different regression equations, and the 3-site protocols use different anatomical sites. The 7-site protocol requires chest, midaxillary, triceps, subscapular, abdomen, suprailiac, and thigh readings.
- 2
Locate and measure the right-side landmarks
Mark each site before measuring. Pinch the prescribed vertical or diagonal fold, place the caliper about 1 cm from the fingers, and keep the muscle relaxed.
- 3
Estimate density and body composition
The selected Jackson-Pollock regression estimates body density from the summed skinfolds and age. The Siri equation converts density to estimated body-fat percentage, then body weight supplies estimated fat and lean mass.
- 4
Use repetition to improve interpretation
Pro rotates through three rounds and uses each site median. Compare sessions taken with the same protocol, caliper, measurer, landmarks, and general conditions.
- 5
Project calories and macros from lean mass
The Katch-McArdle equation estimates resting energy from lean mass. Your selected activity level produces maintenance calories, then Caliper Cal shows goal-specific calorie, protein, fat, and carbohydrate targets.
MEASUREMENT GUIDANCE
Detailed direction, inside the app.
Each protocol connects its required sites to illustrated, written guidance for locating the anatomical landmark, positioning the person, taking the prescribed fold, and placing the caliper.
THE FULL WORKFLOW
Reference the landmark without leaving the measurement.
Male and female guidance is available for the sites required by the selected Jackson-Pollock protocol. The reference view and technique instructions stay together so the user can confirm the location before entering a reading.
SOURCE-AWARE BY DESIGN
The research is useful.
The limitations matter.
Caliper Cal uses the generalized Jackson-Pollock body-density equations and the Siri conversion. The original male research included adults ages 18 to 61. The original female research included adults ages 18 to 55 and advised extra care when interpreting results for women over 40.
Accuracy can vary with measurement technique and with age, body-fat level, ethnicity, fat distribution, athletic population, or other differences from the original research samples.
START FREE. UPGRADE ONCE.
Body fat, calories, and macros are included free.
Use both Jackson-Pollock protocols, calculate nutrition targets, and save personal results before deciding whether you need advanced tracking and client tools.
FREE
For your own body-composition and nutrition check-ins
- Weight-loss, maintenance, and gain calorie targets
- Protein, fat, and carbohydrate targets
- 3-site and 7-site equations
- One personal profile
- Latest three results displayed
- Measurement guidance
PRO · ONE-TIME PURCHASE
For long-term tracking and client work
- Everything in Free
- Multiple client profiles
- Complete history displayed
- Three rounds and automatic medians
- JSON data export
- No advertising
AVAILABLE NOW ON ANDROID
Calculate what your body-composition result means for your daily intake.
Measure with anatomical guidance, estimate lean mass, and get calorie and macro starting targets for losing, maintaining, or gaining weight in one app.
Caliper Cal is not a medical device and does not diagnose, treat, cure, or prevent any medical condition. Results are estimates for general fitness and informational purposes. Consult a qualified healthcare professional for medical advice and before making decisions that could affect your health.