Tabata Interval Timer Calculator
Compute the total session time for a Tabata-style high-intensity interval workout from the number of rounds, work second...
Pace, power, and performance math for every sport.
Running, cycling, swimming, and gym math — from race pace and splits to power-to-weight and training-load calculations.
Compute the total session time for a Tabata-style high-intensity interval workout from the number of rounds, work second...
Compute target training heart rate using the Karvonen formula: target = (HRmax − HRrest) · intensity + HRrest. Reports z...
Compute the working weight at a chosen number of reps from your 1-rep max using a standard percentage table (e.g., 5 rep...
Compute an approximate percentile rank for a 1-minute sit-up test using a normal-distribution model fit to ACSM age- and...
Compute an approximate percentile rank for the maximum forearm-plank hold time, using a normal model fit to common adult...
Estimate VO₂max in mL/(kg·min) from the distance covered during the Cooper 12-minute run test using the regression VO₂ma...
Compute the NBA assist-to-turnover ratio — the basic point-guard efficiency stat: AST / TO. Career elite point guards av...
Compute the IWF Sinclair coefficient and Sinclair total — the standard cross-bodyweight comparison metric for Olympic we...
Compute a bowler's average pinfall: average = total_pins / games. Reports the per-game average and the simulated 200-bas...
Estimate VO₂max (mL/kg/min) from the Rockport one-mile walk test using Kline et al.'s regression: VO₂max = 132.853 − 0.0...
Compute the effective field goal percentage of a basketball player or team — FG% adjusted to credit the extra value of t...
Compute the 500-metre split time (sec/500 m) from power output in watts using the standard rowing ergometer equation: sp...
Compute the probability of rolling a Yahtzee large straight (1-2-3-4-5 or 2-3-4-5-6) in N attempts of a single full re-r...
Compute a goaltender's save percentage and goals-against average from saves, goals allowed and minutes played. SV% = sav...
Calculates running pace in min/km and min/mile from total finish time and race distance. Useful for comparing performanc...
Compute the hypergeometric probability of drawing exactly k lands in a 7-card opening hand from a deck of size N contain...
Compute the average damage of a D&D damage expression of the form n·d_x + mod (e.g. 3d6 + 4). Reports the per-die mean,...
Compute a pitcher's WHIP — walks plus hits divided by innings pitched: WHIP = (BB + H) / IP. Ace pitchers run < 1.10; be...
Look up the official Boston Athletic Association Boston-marathon qualifying time (per current rules) for the runner's ag...
Estimate maximal aerobic capacity (VO2max in mL·kg⁻¹·min⁻¹) from a 1.5-mile timed-run field test using the Pollock-Wilmo...
Compute a baseball player's fielding percentage — the share of fielding chances cleanly converted: FP = (putouts + assis...
Convert a French sport-climbing grade entered as a numeric proxy (e.g. 5.0 = French 5a, 6.0 = 6a, 6.5 = 6b, 7.0 = 7a, 7....
Compute average sprint speed from a timed run over a known distance. Reports speed in m/s, km/h, mph, and as a 100 m equ...
Compute a cricketer's batting average and strike rate from runs scored, balls faced, innings played and times dismissed...