Fitness Calculators
Fitness calculators for 1RM, pace, BMI for athletes, calorie burn, strength standards and workout planning.
12 calculators
1RM Calculator — Estimate One-Rep Max & Rep Ladder
Estimate your 1RM from a weighted set with the Epley and Brzycki formulas, then see the derived 2RM, 5RM, 10RM and 20RM rep-max ladder for training.
5K Pace Calculator: Min/Km, Min/Mile & Race Predictions
Free 5K pace calculator: convert your 5K finish time into min/km and min/mile pace, plus predicted 10K, half-marathon and marathon times.
Bench Press Calculator — Estimate Your 1RM
Free bench press 1RM calculator. Enter weight lifted and reps to estimate your one-rep max with Epley/Brzycki formulas and 80/90/95% training loads.
Brzycki 1RM Calculator — Estimate Your One Rep Max
Estimate your one-rep max (1RM) with the Brzycki formula, compare it to Epley, and get 80/90/95% training loads for bench, squat and deadlift.
Creatine Dosage Calculator: Loading & Maintenance Dose
Creatine dosage calculator. Get your daily loading (0.3 g/kg) and maintenance (0.03 g/kg) dose by body weight, plus 5 g scoop counts and timing tips.
Cycling Pace Calculator — Speed, Min/km & Calories
Free cycling pace calculator: convert your ride distance and time into average speed, min/km and min/mile pace, and estimated calories burned.
Deadlift Calculator — Estimate Your 1RM & Wilks
Free deadlift 1RM calculator. Enter weight lifted and reps to estimate your one-rep max with Brzycki/Epley, plus Wilks score and 80/90/95% training loads.
Epley Calculator — Estimate Your One Rep Max (1RM)
Estimate your one-rep max (1RM) from a submaximal set using the Epley formula, compare it with Brzycki, and generate 80/90/95% training loads.
Half Marathon Pace Calculator: Min/Mi & Min/Km
Free half marathon pace calculator: find your min/mile and min/km pace, 5K and 10K splits, and predicted marathon finish using Riegel 1.06 exponent.
Heart Rate Zone Calculator: 5 Training Zones by Age
Heart rate zone calculator: 5 training zones by age (220 minus age). Get recovery, aerobic, tempo, threshold, and VO2 max bpm ranges, plus Karvonen option.
Marathon Pace Calculator: Min/Mile & Min/Km Splits
Free marathon pace calculator: find your min/mile and min/km pace, plus 5K, 10K, and half-marathon split times, from your target finish time.
One-Rep Max Calculator — Estimate Your 1RM
Free one-rep max calculator. Estimate your 1RM from weight and reps with the Epley and Brzycki formulas, plus 80/90/95% training loads.