Sports & Fitness Performance Calculators
11 tools in this collection — free, instant, and private in your browser.
Sports and fitness performance calculators help competitive athletes and recreational enthusiasts translate raw effort into meaningful metrics they can act on. While general fitness tools focus on health and daily habits, performance calculators are designed around competition standards, training load optimization, and cross-sport comparisons that serious athletes need.
Running performance tools cover the full spectrum from daily training to race day. The Running Pace Calculator and Treadmill Pace Calculator convert between pace, speed, and distance in the units you prefer. The Marathon Time Predictor and Running Race Time Predictor use established physiological models to project finish times across distances based on a recent performance, helping you set realistic goals and plan your splits.
Cycling tools address the physics of riding in a way that simple speed metrics cannot. Power-to-weight ratio is the key determinant of climbing performance — more watts per kilogram means you go uphill faster. The Cycling Power-to-Weight Ratio Calculator and FTP Cycling Training Zones Calculator help you structure training around your functional threshold power, which is the best single metric for cycling fitness across all terrain.
Strength sport calculators solve a problem specific to powerlifting and weightlifting: comparing total lifted weight across different body weights and competition classes. Raw totals favor heavier lifters, so scoring systems like Wilks and Dots apply a correction formula to normalize performance across body weights. The Wilks Score Calculator and Dots Score Calculator let you compare your performance to others or track your own relative strength over time as your body weight changes.
- Use the Barbell Plate Calculator before every training session to determine which weight plates to load for a target bar weight.
- Use the Swim Pace Per 100m Calculator to set interval targets for pool workouts based on your goal race pace.
- Use the Pace to Speed Converter when switching between metric and imperial units or between running and cycling conventions.
For multi-sport athletes, having a single place to handle the arithmetic of each discipline eliminates the friction that otherwise interrupts training planning.
All sports & fitness performance calculators
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| Tool | What it does |
|---|---|
| Barbell Plate Calculator | Enter your target weight and bar weight to see exactly which plates to load on each side. |
| Cycling Power-to-Weight Ratio Calculator | Calculate your cycling power-to-weight ratio (W/kg) and see how it compares to rider categories. |
| Dots Score Calculator | Calculate your DOTS score — the IPF's bodyweight-adjusted strength metric for powerlifting. |
| FTP Cycling Training Zones Calculator | Calculate your 7 cycling power training zones from your Functional Threshold Power (FTP). |
| Marathon Time Predictor | Predict your marathon finish time from any known race result using the Riegel formula. Shows predicted times from 1 mile to full marathon. |
| Pace to Speed Converter | Convert running pace (min/km) to speed (km/h) and vice versa instantly. |
| Running Pace Calculator | Calculate running pace, finish time, or distance. Enter any two of the three to get the third. |
| Running Race Time Predictor | Predict your finish time for any race distance from a known performance using the Riegel formula. |
| Swim Pace Per 100m Calculator | Calculate your swim pace per 100 metres from total distance and time. |
| Treadmill Pace Calculator | Convert treadmill speed and incline to an equivalent flat-ground outdoor running pace. |
| Wilks Score Calculator | Calculate your Wilks score to compare powerlifting total across different bodyweights. |
Frequently asked questions
- What is FTP and why does it matter for cycling training?
- Functional Threshold Power is the maximum average power output in watts you can sustain for approximately one hour. It represents the boundary between aerobic and anaerobic effort and is used to define training zones from active recovery through VO2 max intervals. All structured cycling training is anchored to FTP because it scales with your current fitness level and adjusts as you improve.
- Which is more accurate for predicting marathon time, recent race results or training paces?
- Recent race results at shorter distances are generally more accurate predictors because they reflect actual competitive performance under fatigue conditions. Training paces can overestimate race performance because they are run with full recovery between sessions. A half marathon time from the last 8-12 weeks is typically the best input for marathon prediction models.
- What is the difference between the Wilks score and the Dots score in powerlifting?
- Both are body-weight-adjusted scoring systems used to compare powerlifting totals across weight classes. The Wilks formula was developed in the 1990s and uses a polynomial correction that some athletes argue over-rewards lighter lifters at the extremes. The Dots formula was introduced in 2019 as a revised standard that produces more consistent relative scores across the full range of body weights. Most federations have moved toward Dots for official rankings.