Health & Fitness
Running Pace Calculator
Calculate running pace, finish time, or distance with kilometer and mile pacing, race presets, and an even-pace split table.
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Calculator collection
Health & Fitness
Estimate body metrics, daily energy, nutrition targets, running, training, heart-rate zones, and movement.
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Health & Fitness
Heart Rate Zones Calculator
Estimate five exercise heart-rate zones with maximum-heart-rate or heart-rate-reserve methods and clear safety guidance.
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Health & Fitness
Race Time Predictor
Project an equivalent finish time from a recent race with the Riegel model, common race presets, pace conversion, and comparison table.
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Health & Fitness
Steps and Distance Calculator
Convert between steps, distance, and measured step length with metric and imperial units plus optional cadence-based time.
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Health & Fitness
Running Calorie Calculator
Estimate gross and net activity calories from body weight, distance, duration, pace-derived METs, or a chosen activity MET.
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Health & Fitness
VO₂ Max Estimate Calculator
Estimate aerobic capacity with a Cooper 12-minute run, Rockport one-mile walk, or maximum-to-resting heart-rate ratio.
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Health & Fitness
Training Pace Zones Calculator
Turn a recent race performance into easy, marathon, threshold, interval, and repetition training pace ranges.
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Health & Fitness
Running Cadence and Step Length Calculator
Solve running cadence, distance per step, or pace and analyze steps, two-step strides, timing, and a same-speed cadence scenario.
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Health & Fitness
BMI & Healthy Weight Calculator
Calculate adult BMI, weight category, and the BMI-based healthy-weight range for a given height in metric or imperial units.
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Health & Fitness
BMR & TDEE Calculator
Estimate resting energy, maintenance calories, goal-adjusted calories, and activity-level comparisons with transparent equations.
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Health & Fitness
Body Fat Percentage Calculator
Estimate body-fat percentage, fat mass, lean mass, BMI, and waist-to-height ratio from circumference measurements.
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Health & Fitness
Macronutrient Calculator
Convert a daily calorie target into protein, carbohydrate, fat, per-meal amounts, and an adult AMDR comparison.
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Health & Fitness
One-Rep Max Calculator
Estimate one-repetition maximum with seven equations, compare model range, and build rounded percentage training loads.
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Health & Fitness
Barbell Plate Calculator
Build a symmetrical barbell from your actual plate inventory and compare exact, nearest-under, and nearest-over plans.
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Health & Fitness
Strength Training Volume Calculator
Track multiple exercises and set groups, separate warm-ups, calculate external volume load, intensity, and prior-session change.
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Health & Fitness
Activity Calories Calculator
Combine activities and estimate gross and net energy expenditure from duration, body weight, and 2024 Compendium MET values.
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Health & Fitness
RPE and RIR Load Calculator
Convert RPE and repetitions in reserve, estimate percentage of one-rep max, calculate a rounded target load, or estimate 1RM from a completed set.
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Health & Fitness
Strength Warm-Up Set Calculator
Build a rounded ramp-up sequence from a working load or percentage of 1RM with preset and custom warm-up schemes.
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Health & Fitness
Progressive Overload Planner
Build a week-by-week arithmetic strength progression using fixed load, percentage increases, or double progression with optional deload weeks.
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Health & Fitness
Powerlifting Total and IPF GL Score Calculator
Record three attempts per lift, calculate a valid total, body-weight multiple and official IPF GL points.
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Health & Fitness
Cycling FTP & Power Zones Calculator
Enter a known FTP or estimate it from a field test, then calculate seven cycling power zones, sweet spot power, and watts per kilogram.
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Health & Fitness
Bike Gear Ratio, Cadence & Speed Calculator
Compare chainring and sprocket combinations, rollout, gear inches, speed at cadence, required cadence, total range, and near-duplicate gears.
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Health & Fitness
Cycling Power-to-Weight Calculator
Calculate watts per kilogram across five cycling durations, compare two profiles, and reverse-calculate target FTP power or mathematical body mass.
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Health & Fitness
Cycling Power, Grade & Speed Calculator
Estimate steady cycling speed from power or required power from speed using grade, mass, distance, wind, rolling resistance, aerodynamics, and drivetrain loss.
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Health & Fitness
Cycling Training Load Calculator
Calculate intensity factor, variability index, mechanical work, TSS-compatible ride load, load per hour, and projected weekly load from FTP and power data.
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Health & Fitness
Cycling Critical Power & W′ Calculator
Fit critical power and W prime from two to five maximal cycling efforts, compare two linearized models, inspect fit error, and predict power or duration.
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Health & Fitness
Cycling Pace & Split Planner
Solve cycling time or average speed, subtract stopped time, and generate distance or lap splits using even, negative, or positive pacing.
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Health & Fitness
Cycling Climb & VAM Calculator
Analyze one or more cycling climbs with route distance, elevation gain, time and repetitions to calculate exact average grade, VAM, ascent speed and totals.
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Health & Fitness
Cycling Route Power & Time Planner
Plan up to twelve cycling route segments with distance, grade, target power, wind and rolling resistance to estimate speed, time, work and elevation.
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Health & Fitness
Cycling Interval & W′ Balance Calculator
Build repeated intervals and simulate second-by-second W′ depletion above critical power and adjustable recovery below it.
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Health & Fitness
Cycling Fueling & Energy Planner
Estimate energy from power or manual calories, set a carbohydrate target, combine drinks and food, and fill the remainder with whole gels.
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Health & Fitness
Cycling Sweat Rate & Hydration Calculator
Calculate sweat loss and hourly sweat rate from pre/post weight, fluid intake, urine and duration, then scale a user-selected replacement plan.
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Health & Fitness
Cycling Tire Pressure Calculator
Estimate separate front and rear bicycle tire pressures from total system weight, load split, measured tire width, surface, casing and tube setup, with user-entered tire and rim limits.
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Health & Fitness
Bike Fit Frame & Saddle Calculator
Estimate a frame-size range, saddle-height starting point, pedal-axis comparison, standover clearance and reach profile from body measurements and bicycle type.
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Health & Fitness
Bike Chain Length Calculator
Estimate bicycle chain length from chainstay and largest gears, add large-cog or custom allowance, account for suspension growth, and compare with the packaged chain.
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Health & Fitness
Bicycle Spoke Length Calculator
Calculate independent left and right bicycle spoke lengths from measured ERD, hub flange geometry, lacing crosses, rim offset and spoke-hole style, with stock-length rounding.
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Health & Fitness
Bicycle Wheel & Tire Size Calculator
Calculate bicycle wheel diameter and circumference from ETRTO dimensions, use measured rollout, check bike-computer error and compare another tire size.
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Health & Fitness
Bike Suspension Sag Calculator
Calculate fork or rear-shock target sag, compare measured displacement and estimate one cautious air-pressure or coil-rate adjustment.
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Health & Fitness
Bike Frame Geometry Comparison Calculator
Compare two bicycle frames by stack, reach, wheelbase, rear-center, angles, BB drop and calculated steering trail.
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Health & Fitness
Tubeless Tire Sealant Calculator
Estimate sealant for initial bicycle tubeless setup or top-ups, then calculate complete bottles, leftover and optional cost.
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Health & Fitness
Bike Stem, Spacer & Handlebar Position Calculator
Compare two bicycle cockpit positions from frame stack and reach, head angle, spacers, stem and handlebar dimensions, then search available setup combinations.
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Health & Fitness
Mountain Bike Coil Spring Rate Calculator
Estimate a rear-shock coil spring starting rate from ready-to-ride weight, rear load bias, wheel travel, shock stroke, target sag and preload.
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Health & Fitness
Bicycle Crank Length & Pedal Motion Calculator
Compare two crank lengths by pedal circle, pedal speed, tangential force, saddle-height reference and top- or bottom-of-stroke clearance.
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Health & Fitness
Bicycle Spoke Tension Balance Analyzer
Analyze measured left- and right-side spoke tensions, relative uniformity, target ranges, side averages and individual outliers.
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