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Cycling Power Calculator (FTP & Training Zones)
x402
Cycling Power Calculator (FTP & Training Zones) is a paid API for AI agents from sports-calc.x402tookit.com, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-21).
Calculates cycling FTP from a 20-minute or 8-minute test, watts per kilogram, and the seven Coggan power training zones in watts.
Price / call$0.02
Success—
StatusUnknown
How this service works
Cycling FTP from a 20 or 8 minute test, watts per kilogram, and the seven Coggan training zones in watts.
Output
Returns the calculated FTP in watts (derived from the test method used), watts per kilogram (if weight provided), and all seven Coggan training zones each with a name, watt range, and percentage of FTP. Also includes a summary, the basis of the calculation, and any warnings or disclaimers.
Example use cases
Post-test FTP and zone setup
“I just did a 20-minute all-out effort on my bike and held 310 watts average. I weigh 78 kg. What's my FTP, my w/kg, and what are my seven Coggan training zones in watts?”
8-minute test zone calculation
“I couldn't hold a 20-minute effort today so I did an 8-minute test instead and averaged 330 watts. Can you calculate my FTP and give me all my power training zones?”
Training zones from known FTP
“My FTP is 250 watts and I weigh 65 kg — can you just show me all seven Coggan zones in watts and my watts per kilogram?”
Technical details
Endpoint
GEThttps://sports-calc.x402tookit.com/cycling-power?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need cycling-specific FTP estimation and Coggan zone generation from a structured field test. Prefer this over generic calculators when the user has raw test power data (20-min or 8-min effort) or a known FTP and needs actionable training zones in watts with proper sport-science methodology (95% rule for 20-min, 90% rule for 8-min).
Side effects
- Missing required power input (no test watts or FTP provided) — returns validation error
- Implausible power values (e.g. zero or extremely high watts) — may return degraded result or reasons array
- Missing weight when watts-per-kg is expected — wattsPerKg will be null
- Conflicting inputs (e.g. both 20-minute and 8-minute watts provided) — service may pick one or flag ambiguity
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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