sport science tools

small, single-purpose calculators for sport science, S&C, rehab, and self-coached athletes. built by haresh suppiah.

calculators & converters

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sprint speed calculator
convert between m/s, km/h, mph and calculate split times
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effect size calculator
cohen's d, hedges' g with hopkins magnitude thresholds

training load & monitoring

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ewma training load monitor
acute:chronic load with ewma and uncoupled ratios

planned — training load & monitoring

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hrv rolling baseline
recompute hrv baseline from raw rmssd, with swc bands

planned — performance profiling

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load–velocity profile
vbt linear fit, 1rm estimate, %1rm load table
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mas / mss / asr calculator
maximal aerobic & sprint speed, session prescriptions
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samozino sprint fv profile
v0, f0, pmax from split times with environmental corrections
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critical speed / power model
two- and three-parameter hyperbolic fit, d' balance

planned — clinical & health

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return-to-play asymmetry dashboard
lsi + efi with masking flags across a test battery
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energy availability / red-s screener
ea per kg ffm with ioc clinical thresholds
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skinfold body composition
jackson-pollock 3 & 7, durnin-womersley
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smallest worthwhile change
cv- and sd-based swc bands for repeated measures