Health & Fitness
Cycling TSS & Intensity Factor Calculator
Calculate training stress score and intensity factor for a cycling session.
Preparing your result…
What this calculator does
Calculates Cycling TSS & Intensity Factor Calculator using the formula verified against the cited source.
What your result means
An estimate from the inputs you enter, within the scope stated below — not advice.
Formula
IF = NP ÷ FTP; TSS = duration(s) × NP × IF ÷ (FTP × 3600) × 100
The step-by-step working for your own numbers appears with the result above and in the PDF report.
Frequently asked questions
Symbols and assumptions
- Inputs
- The values entered in the fields above
- • Cycling intensity factor IF=normalized power/FTP. TSS=duration seconds×NP×IF/(FTP×3600)×100=duration hours×IF²×100. NP and FTP both watts.
Sources and review
Reviewed 2026-10-18 · Next review 2027-04-18
- • Originator definitions. Require FTP>0 and distinguish fraction IF=1 from percent 100%. Use power-based TSS rather than applying the identical equation to unrelated sport-specific stress measures. Accurate NP and appropriate threshold are prerequisites.
Important limitation
This is an educational estimate based only on the values and formula shown. Verify current rates, rules, units, and professional standards before relying on the result. It is not personalized financial or investment advice.
Quick reference
| Scenario | Normalised power (W) | FTP (W) | Duration (minutes) | Training stress score |
|---|---|---|---|---|
| Worked example | 230 | 250 | 90 | 126.96 TSS |
| Half the amounts | 115 | 125 | 45 | 63.48 TSS |
| Double the amounts | 460 | 500 | 180 | 253.92 TSS |
Need the full picture? Get the detailed PDF report with charts, tables, formulas and working steps.
Reviewed 2026-10-18 · Next review 2027-04-18
Report a mistake or request an improvement
Tell us if a formula, unit, explanation, or result needs attention. Your message will include this calculator’s name and page.
Related calculators
Cycling Watts per Kg Calculator
Calculate power-to-weight ratio and compare it to typical cycling performance categories.
FTP 20-Minute Test Calculator
Convert a 20-minute cycling test into functional threshold power and training zones.
Normalized Power from Variability Index
Estimate normalised power from average power and ride variability.
5K / 10K Intermediate Race Splits Calculator
Build even-pace kilometre and halfway checkpoints for a target 5K or 10K finish time.
Critical Swim Speed (CSS) Calculator
Calculate sustainable swimming pace per 100 metres from timed 400 m and 200 m efforts.
Grade Adjusted Pace Calculator
Convert an uphill or downhill running pace into the equivalent effort pace on flat ground.
Namaste! Did this Cycling TSS & Intensity Factor Calculator help you?
Aapka ek click humein behtar banata hai. Just tap a star, no sign-in, no typing.