Calculate average running pace and speed from distance and elapsed time.
You enter: Distance · Elapsed time
Example: Pace = 6:00 min/km; speed = 10 km/h; pace ≈ 9:39 min/mile.
Open Running Pace and Speed Calculator →
Estimate wheel speed and crank cadence from road speed, wheel diameter, and a wheel-to-crank ratio.
You enter: Road speed · Wheel diameter · Wheel revolutions per crank revolution
Example: Wheel speed ≈ 189.4 rpm; cadence ≈ 75.8 rpm.
Open Cycling Cadence Calculator →
Estimate steady cycling power from mass, speed, road grade, rolling resistance, and aerodynamic drag inputs.
You enter: Rider and bicycle mass · Speed · Road grade · Rolling-resistance coefficient · Aerodynamic drag coefficient · Frontal area · Air density
Example: Aerodynamic and rolling power ≈ 314.9 W.
Open Cycling Power Estimate →
Calculate bicycle speed from wheel diameter, cadence, and a wheel-to-crank distance ratio.
You enter: Wheel diameter · Cadence · Wheel revolutions per crank revolution
Example: Speed ≈ 29.688 km/h.
Open Bicycle Speed from Cadence Calculator →
Estimate hiking time from horizontal distance, base speed, elevation gain, and a supplied climbing speed.
You enter: Trail distance · Horizontal travel speed · Elevation gain · Climbing rate
Example: Estimated time = 3.25 hours.
Open Hiking Time with Elevation Calculator →
Estimate a traditional displacement-hull speed from waterline length using a supplied hull-speed coefficient.
You enter: Waterline length · Hull-speed coefficient
Example: Hull-speed estimate = 6.70 knots.
Open Displacement Hull Speed Calculator →
Calculate average stride length from walking distance and step count, with a metres-per-step result.
You enter: Distance · Step count
Example: Average stride length ≈ 0.769 m.
Open Walking Stride Length Calculator →
Calculate minimum room length, width, and area from table dimensions and cue clearance on every side.
You enter: Table length · Table width · Cue clearance per side
Example: Room = 5.54 m × 4.27 m; area ≈ 23.656 m².
Open Pool Table Room Size Calculator →
Calculate average pace and speed from a distance, elapsed time, and the distance unit you use.
You enter: Distance · Elapsed time · Distance unit
Example: The average is 6.00 minutes per kilometre and 10.00 km/h.
Open Pace and Speed Calculator →
Convert a 5-kilometre finish time into average kilometre and mile pace and speed.
You enter: 5K finish time
Example: A 25-minute 5K is 5:00 per km, about 8:03 per mile, and 12.00 km/h.
Open 5K Pace Calculator →
Calculate average pace and speed for a half-marathon from a finish time.
You enter: Half-marathon finish time
Example: A 2-hour half-marathon averages about 5:41 per km and 9:09 per mile.
Open Half-Marathon Pace Calculator →
Calculate average marathon pace and speed from a full-marathon finish time.
You enter: Marathon finish time
Example: A 4-hour marathon averages about 5:41 per km and 9:09 per mile.
Open Marathon Pace Calculator →
Separate moving time from stop time to estimate cycling pace, moving speed, and elapsed speed.
You enter: Cycling distance · Moving time · Stopped time
Example: Moving speed is 24.00 km/h; elapsed speed is 21.82 km/h; moving pace is 2.50 min/km.
Open Cycling Pace and Moving Speed Calculator →
Estimate bicycle speed from wheel diameter, pedalling cadence, and wheel-to-crank gear ratio.
You enter: Wheel diameter · Cadence · Wheel rotations per crank rotation
Example: The ideal wheel speed is about 35.63 km/h.
Open Bike Cadence and Speed Calculator →
Project a target race time from a completed distance and time using an adjustable endurance exponent.
You enter: Completed distance · Completed time · Target distance · Endurance exponent
Example: The model projects a 10K time of about 52.12 minutes.
Open Race Time Predictor →
Estimate a target training pace from a reference performance, target distance, and selected effort percentage.
You enter: Reference distance · Reference time · Target workout distance · Target effort relative to projection
Example: The 8 km scenario is about 45.72 minutes, or 5.71 minutes per km.
Open Training Pace Calculator →
Estimate walking energy from body mass, duration, speed, and uphill or downhill grade using a transparent exercise equation.
You enter: Body mass · Walking duration · Walking speed · Grade
Example: The level-walking scenario estimates about 186.38 kcal.
Open Walking Calorie Estimate →
Estimate running energy from body mass, distance, and a user-selected terrain factor.
You enter: Body mass · Running distance · Terrain factor
Example: The base estimate is 350 kcal.
Open Running Calorie Estimate →
Add swim, bike, run, and transition estimates to plan a total triathlon time.
You enter: Swim distance · Swim pace · Bike distance · Bike speed · Run distance · Run pace · Total transition time
Example: Swim 30 minutes + bike 80 + run 50 + transitions 6 = 166 minutes.
Open Triathlon Time Calculator →
Estimate total swim-session time from distance, pace per 100 metres, and planned rest intervals.
You enter: Swim distance · Pace per 100 metres · Number of rest intervals · Seconds per rest
Example: Active swimming takes 30 minutes; rests add 2.5 minutes; total is 32.5 minutes.
Open Swimming Time Calculator →
Build cycling power zones from functional threshold power using a selectable five-zone or seven-zone percentage scheme.
You enter: Functional threshold power · Zone scheme
Example: The five-zone table begins with 0–55 W and ends with a top zone above 300 W.
Open Cycling Power Zones Calculator →
Calculate a cricket team's net run rate from runs scored, runs conceded, and the legal balls in each innings sample.
You enter: Runs scored · Completed overs for runs scored · Extra legal balls for runs scored · Runs conceded · Completed overs for runs conceded · Extra legal balls for runs conceded
Example: The scoring rate is 5.0, the conceding rate is 4.4, and net run rate is +0.6 runs per over.
Open Cricket Net Run Rate Calculator →
Estimate VO₂ max from a timed 1.5-mile run or walk using the Cooper Institute field-test equation.
You enter: Time to cover 1.5 miles
Example: A 12-minute 1.5-mile time gives an estimated VO₂ max of 43.75 mL/kg/min.
Open Cooper 1.5-Mile VO₂ Max Estimate →
Build an even split schedule from a target distance, finish time, and split length, including the final partial split when the distances do not divide evenly.
You enter: Target distance · Distance unit · Target finish time · Split length
Example: A 10 km target in 50 minutes gives a 5.00 minute/km pace, 10 full 1 km splits, and 5.00 minutes per full split with no remainder.
Open Race Split Planner →
Calculate rowing-erg work time, 500-metre split pace, average speed, estimated watts, and total session time for repeated intervals with optional rest.
You enter: Distance per interval · 500 m split · Number of intervals · Rest between intervals · Stroke rate
Example: At a 2:00/500 m split, one 2,000 m interval takes 480 seconds (8:00), averages 15 km/h, and estimates about 202.55 watts.
Open Rowing Erg Pace and Watts Calculator →
Estimate how a speed difference changes a cycling breakaway's physical gap over a selected time horizon and when a target gap could be reached.
You enter: Current physical gap · Target physical gap · Breakaway average speed · Peloton average speed · Analysis duration
Example: A 3 km/h advantage gains 1,500 m in 30 minutes, moving a 100 m gap to about 1,600 m; the 500 m target would be reached in about 8 minutes.
Open Cycling Breakaway Gap Planner →
Estimate match balls, practice balls, replacement allowance, and cans needed for a tennis event or training block using editable event rules.
You enter: Number of matches · Players or teams per match · New balls planned per match · Practice balls per player-session · Practice sessions per player · Loss or replacement allowance · Balls per can or pack
Example: The scenario uses 32 match balls and 96 practice balls; with a 10% allowance it plans 141 balls, or 47 three-ball cans.
Open Tennis Ball Inventory Planner →
Estimate treadmill workload, oxygen uptake, and METs for a selected stage of the standard Bruce exercise-testing protocol.
You enter: Standard Bruce stage
Example: Stage 1 at 1.7 mph and 10% grade is about 16.26 mL/kg/min, or 4.65 METs, in this workload model.
Open Bruce Protocol METs Estimate →
Estimate points for the seven events in a women’s heptathlon and show track, field, event, and total scores.
You enter: 100 m hurdles time · High-jump height · Shot-put distance · 200 m time · Long-jump distance · Javelin distance · 800 m time
Example: The reference performances produce 1,000 points in each event and a 7,000-point total under the classic constants.
Open Women’s Heptathlon Points Calculator →
Calculate the historical Wilks coefficient and bodyweight-adjusted powerlifting score from category, body weight, and total.
You enter: Wilks category · Body weight · Powerlifting total
Example: At 69.3 kg and a 500 kg total, the historical men’s coefficient is about 0.755206 and the Wilks score is about 377.603.
Open Wilks Powerlifting Score Calculator →
Plan three working sets from a 5/3/1 training max, selected week, and equipment rounding increment.
You enter: Training max · 5/3/1 week · Weight rounding increment
Example: A 100 kg training max in Week 1 produces 65 kg, 75 kg, and 85 kg for the three working sets.
Open 5/3/1 Training-Max Percentage Calculator →
Compare a runner's entered race time with an age-and-category reference standard, then show age grade, time gap, pace, and speed without pretending to supply an official table.
You enter: Athlete age · Actual race time · Reference standard time · Race distance
Example: The entered performance is 90% age-graded, 150 seconds slower than the supplied reference, at 5:00 min/km.
Open Age-Graded Running Calculator →
Estimate a threshold heart rate and pace from a controlled time trial, show heart-rate drift, and display transparent planning screens with clear limits.
You enter: First 10-minute average heart rate · Last 20-minute average heart rate · Time-trial duration · Distance covered
Example: The field-test screen estimates 170 bpm, 12 km/h, 5:00 min/km, with 10 bpm of heart-rate drift.
Open Anaerobic Threshold Field-Test Calculator →
Add swim, bike, run, and transition times for a sprint, standard, or custom course and show total time, discipline shares, pace, and speed.
You enter: Course distance preset · Swim time · Bike time · Run time · Transition 1 time · Transition 2 time · Custom swim distance · Custom bike distance · Custom run distance
Example: The total is 160 minutes: 2:00 min/100 m swim pace, 32 km/h bike speed, and 5:00 min/km run pace.
Open Triathlon Finish-Time Breakdown Calculator →
Project a target running time from a measured mile using a transparent distance-power model, with target pace, speed, and model cost shown together.
You enter: Reference mile time · Target distance · Target distance unit · Endurance exponent
Example: The model projects roughly 41.99 minutes for 5 km, or about 8:24 min/km; the exact display follows the entered exponent.
Open Magic Mile Race-Time Predictor →
Project weekly training hours through a build and taper using explicit progression, reduction, and session-count inputs, with a transparent workload summary.
You enter: Current weekly training · Build weeks · Weekly progression · Taper weeks · Taper reduction · Sessions per week
Example: A 10-hour base with 5% weekly growth reaches about 12.16 hours at peak; a 30% two-week taper target is about 8.51 hours.
Open Triathlon Training-Load Planner →
Resolve true wind and board motion into apparent wind, dynamic pressure, and a transparent sail-force screen for a simplified windsurfing physics scenario.
You enter: True wind speed · Board speed · Angle between true wind and course · Sail area · Air density · Combined force coefficient
Example: The simplified screen gives 29.1548 km/h apparent wind and an aerodynamic force estimate of about 241.0 N.
Open Windsurfing Apparent-Wind and Sail-Force Calculator →
Estimate apparent wind, aerodynamic dynamic pressure, lift, drag, and resultant kite force from wind, rider speed, angle, kite area, and coefficients.
You enter: True wind speed · Rider or kite speed component · Angle between wind and motion · Kite reference area · Air density · Lift coefficient Cₗ · Drag coefficient Cᵈ
Example: At 10 m/s wind, 5 m/s motion, and a 90° included angle, apparent wind is about 11.18 m/s; the simplified lift is about 612.5 N, drag about 76.6 N, and resultant about 617.3 N.
Open Kiteboarding Apparent Wind and Force Screen →
