Tools you might need next
Calculate swim pace per 100m or 100 yards from time and distance. Free swim pace calculator for pool training, triathlon prep, and swim workouts.
Calculate SWOLF efficiency score for a pool length. Free swolf score calculator for pool training, triathlon prep, and swim workouts.
Calculate Critical Swim Speed from 400 m and 200 m time trials. Free css (critical swim speed) calculator for pool training, triathlon prep, and swim workouts.
This tool applies a standard formula from the relevant domain. The computation is deterministic — given the same inputs, the result is always identical. The formula accounts for the primary variables that determine the output.
Cd ≈ 2P / (ρ × A × v³) — simplified from pace comparisonThe calculation requires: Baseline Pace (sec/100m), Improved Pace (sec/100m), Est. Frontal Area (m²). Each parameter contributes to the final result according to the formula above. Accuracy depends on the precision of your input measurements.
Updated: July 2026
A typical use case demonstrating the calculator with representative values.
→ Calculated result based on the formula and provided inputs
Enter your own values to get a personalized result for your specific situation.
→ Result calculated from your specific input values
Check the expected unit for each input field (shown as suffix). Converting between imperial and metric units before entering values prevents calculation errors.
Ensure denominator values (divisors) are non-zero. The calculator validates this, but understanding which fields cannot be zero helps interpret results correctly.
Estimate relative drag change from pace at two different suit/position setups. Free swim drag coefficient estimate calculator for pool training. It applies the calculation formula (Cd ≈ 2P / (ρ × A × v³) — simplified from pace comparison). For example: 95→92 sec/100m after suit change — A typical use case demonstrating the calculator with representative values.