Health & Lifestyle Calculators

Tools for health, fitness, nutrition, cycling, and everyday lifestyle calculations to help you stay on track.

Body Metrics

Nutrition

Activity & Performance

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Age Calculator

Calculate your exact age in years, months, and days.

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Bike Gear Calculator

Compute gear inches and speed estimates for your bicycle setup.

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Climbing Grade Converter

Convert selected YDS sport climbing grades to approximate French grades.

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Cycling FTP Calculator

Estimate FTP and power zones from a 20-minute cycling test.

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Cycling Power-to-Weight Calculator

Calculate your FTP power-to-weight ratio for cycling performance.

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Fuel Efficiency Calculator

Calculate MPG, fuel costs, and trip expenses for your vehicle.

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GPA Calculator

Calculate your weighted GPA and letter grade from course grades.

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Health Calculator

Health and wellness tools.

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Heart Rate Zone Calculator

Estimate training heart-rate zones using max heart rate.

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Hiking Pace Calculator

Estimate hiking time based on distance, elevation gain, and fitness level.

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One Rep Max Calculator

Estimate one-rep max strength from training weight and reps.

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Pace Per Mile Calculator

Calculate running pace per mile and per kilometer.

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Pregnancy Due Date Calculator

Estimate due date based on the first day of the last menstrual period.

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Sleep Calculator

Estimate wake-up or bedtime using common 90-minute sleep cycles.

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Steps to Miles Calculator

Convert step count to approximate miles and kilometers.

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Target Heart Rate Calculator

Estimate your target training heart-rate zone by intensity.

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Tire Pressure Calculator

Find optimal tire pressure for your bike based on weight and tire size.

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Trail Elevation Gain Calculator

Estimate average trail grade and vertical climbing speed.

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Weight Calculator

Calculate weight and conversions.