All tools
Pick a calculator. Each one solves a problem that the generic online versions get wrong or oversimplify.
Watts / kg & Climb Predictor
W/kg plus realistic climb-time forecasting with headwind + altitude adjustment.
FTP Zones & Race Pace
7-zone training model plus race-specific pacing for road, gravel, crits and TT.
CdA / Aero Time Saver
Compare positions, helmets and wheels. See the actual seconds saved at race speed.
Chain Wear & Replace Timing
Predict remaining chain life based on mileage, conditions and cassette cost.
Gear Ratio Visualizer
Cross-cassette speed vs cadence. Find your dead-spot gears and ideal cruising ratios.
Hydration & Sodium Planner
Hour-by-hour fluid and electrolyte needs with hot-weather warning zones.
Tire Pressure Optimizer
System weight, tire width, surface. Get a starting pressure plus lower/upper bound.
Bike vs Car Carbon Footprint
Commute comparison with food offset, marginal-emission context and what to actually claim.
Climb Difficulty Grader
Beyond the Hors Catégorie 1-4 scale: time estimates at your W/kg and gradient profile.
Ride Comfort Index
Wind chill + humidity + WBGT for the bike. Clothing and hydration recommendations.
Fueling Plan Generator
Hour-by-hour carb + caffeine schedule for races and long fondo events.
Bike Fit Estimator
Frame size + reach + stack targets from body measurements and flexibility.
Brake Distance (Wet/Dry)
Reaction + braking distance, rim vs disc, dry/wet/leafy conditions.
Cadence & Muscle Efficiency
Find your self-selected cadence sweet spot from duration and intensity.
E-Bike Range Estimator
Realistic battery range across assist levels, terrain and temperature.
Crank Length Recommender
Inseam, hip mobility, discipline. Not the generic 172.5-mm-for-everyone answer.
Spoke Tension Checker
From rim/tire/wheel spec — predict a target average tension to dial in.
Ride / No-Ride Weather Decider
Forecast input, gets a go/no-go + risk checklist (wind, ice, lightning, visibility).
Bikepacking Weight Budget
Day-by-day weight and resupply planning for multi-day tours.
Segment Time Predictor
Predict climb and TT segment times from FTP, weight and conditions.
About RideMath
RideMath started as a personal spreadsheet to answer the kind of questions you actually ask mid-week: "If I drop my bars 2 cm, how much time do I save on Saturday's TT?" or "Is this climb a Cat 3 or a Cat 2?" — but with realistic assumptions, not marketing-grade guesses.
The goal of this site is to give intermediate-to-advanced cyclists a place to run real numbers without signing up, downloading an app, or wading through affiliate-stuffed "best of" articles. Every calculator is self-contained: the calculation runs entirely in your browser, and we don't store any of your inputs.
Most calculators on this site combine a primary computation with two or three realistic extras — a safety cross-check, a "what if" sensitivity, or a sanity chart. The pages aren't meant to replace a coach or a bike fitter; they're meant to help you walk into those conversations more informed.
Who this is for: club riders, racers, bikepackers, commuters, and home mechanics. Who this is not for: pro-team staff (you have better tools) or complete beginners (you should probably book a free intro session with your local shop first).
Privacy Policy
Last updated: 2026-09-17.
Data we don't collect. All calculator inputs and results stay on your device. We do not run analytics that fingerprint you, and we do not store form values, FTP numbers, route names or anything else on a server. There is no account system, so there is nothing to leak.
Cookies and third-party advertising. This site may display ads served by Google AdSense. Google, as a third-party vendor, uses cookies to serve ads based on a user's prior visits to this site or other sites. Google's use of advertising cookies enables it and its partners to serve ads based on the visit to this site and/or other sites on the Internet. You can opt out of personalized advertising by visiting Google Ads Settings. Third-party vendors, including Google, use cookies to serve ads based on a user's prior visits to this site or other sites.
Cookies in detail. A cookie is a small file placed on your device. We use only the cookies strictly necessary for ad serving and basic site function. We do not set any first-party analytics cookies. For information about cookies in general, see aboutcookies.org.
Local storage. Some calculators may store non-identifying UI preferences (e.g. metric vs imperial) in your browser's local storage. You can clear this at any time by clearing site data in your browser.
Children's privacy. This site is not directed at children under 13, and we do not knowingly collect any information from children.
Contact. Questions about this policy can be sent through the contact form on the hosting platform that serves this site.
Disclaimer
The calculators on RideMath are provided for general informational and educational purposes only. They are not a substitute for professional coaching, medical advice, bike-fitting services, mechanical training, or legal/tax counsel.
Numbers produced by these tools — FTP zones, predicted climb times, fuel plans, brake distances — are estimates based on simplified physical and physiological models. Real-world outcomes depend on factors we cannot measure from your inputs: wind gusts, road surface, fatigue, equipment condition, weather changes, individual physiology, and your actual training history. Always treat results as a starting point, not a prescription.
RideMath makes no warranty about the accuracy, completeness or fitness-for-purpose of any calculation on this site. Use at your own risk. Ride safely, follow local traffic laws, wear a helmet, and assume that other road users may not see you.
Not affiliated with Strava, Garmin, Wahoo, SRAM, Shimano, Campagnolo or any other brand mentioned in calculator copy. Brand names are used descriptively only.