How many calories does 30 minutes on the treadmill burn?

A 75 kg person running at 10 km/h (6:00 min/km) on a flat treadmill burns approximately 1,540 kJ (368 kcal) in 30 minutes. Adding a 5% incline increases this to roughly 2,310 kJ (552 kcal).

Does incline really make a big difference?

Yes. Increasing the incline from 0% to 5% can boost calorie burn by 40–50%. Incline walking at 6 km/h and 12% grade burns nearly as many calories as running at 10 km/h on flat ground.

Are the calorie displays on treadmills accurate?

Treadmill calorie displays can be off by 15–30%, often overestimating. They rarely account for individual fitness level or body composition. This calculator uses standardised MET values for a more reliable estimate.

Is walking on an incline better than running flat?

Incline walking is gentler on joints while still burning significant energy. For weight loss, both are effective. Walking at 6 km/h on a 10–12% incline is a popular low-impact, high-calorie-burn strategy.

Treadmill Calorie Calculator

Find out exactly how many kilojoules or calories you burn during a treadmill workout. This calculator factors in your speed, incline setting, body weight, and session duration to give you an accurate energy expenditure estimate.

Enter Your Details

Body Weight

Treadmill Speed

km/h

Incline

Duration

min

How It Works

Energy burned on a treadmill is calculated using MET values that vary by speed and incline. The base MET for running is determined by speed, then adjusted upward for incline: adjustedMET = baseMET + (incline% x 0.1 x baseMET). Energy (kcal) = adjustedMET x weight (kg) x duration (hours), then converted to kJ by multiplying by 4.184.

Quick Reference

Speed (km/h)	Incline %	MET	30 min (kJ)	30 min (kcal)	60 min (kJ)
5.5	0%	3.5	660	158	1,320
5.5	10%	7.0	1,319	315	2,638
8.0	0%	8.3	1,565	374	3,129
8.0	5%	12.5	2,347	561	4,694
10.0	0%	9.8	1,847	442	3,695
10.0	3%	12.7	2,400	574	4,800
10.0	5%	14.7	2,771	662	5,542
12.0	0%	11.8	2,225	532	4,449
12.0	3%	15.3	2,892	691	5,784
14.0	0%	13.5	2,545	608	5,090

Based on 75 kg body weight. kJ values rounded to nearest whole number.

Frequently Asked Questions

How many calories does 30 minutes on the treadmill burn?: A 75 kg person running at 10 km/h (6:00 min/km) on a flat treadmill burns approximately 1,540 kJ (368 kcal) in 30 minutes. Adding a 5% incline increases this to roughly 2,310 kJ (552 kcal).
Does incline really make a big difference?: Yes. Increasing the incline from 0% to 5% can boost calorie burn by 40–50%. Incline walking at 6 km/h and 12% grade burns nearly as many calories as running at 10 km/h on flat ground.
Are the calorie displays on treadmills accurate?: Treadmill calorie displays can be off by 15–30%, often overestimating. They rarely account for individual fitness level or body composition. This calculator uses standardised MET values for a more reliable estimate.
Is walking on an incline better than running flat?: Incline walking is gentler on joints while still burning significant energy. For weight loss, both are effective. Walking at 6 km/h on a 10–12% incline is a popular low-impact, high-calorie-burn strategy.

Treadmill Energy Expenditure

kcal = Adjusted MET × Weight (kg) × Duration (hours) Adjusted MET = Base MET + (Incline% × 0.1 × Base MET)

Base MET: = Metabolic equivalent based on speed (3.5–16.0)
Incline%: = Treadmill incline as a percentage
Weight: = Body weight in kilograms
Duration: = Workout time in hours

Each 1% incline adds approximately 10% to the base MET value. Walking at 5.5 km/h with 12% incline can burn more energy than running at 10 km/h on flat ground.

Related Tools

Running Calorie Calculator

Calculate kilojoules and calories burned running at different speeds. Compare energy cost by pace and body weight.

Walking Calories & kJ Calculator

Calculate kilojoules and calories burned walking based on your weight, walking speed, and duration or distance.

Treadmill Pace Calculator

Convert treadmill speed (km/h) to running pace (min/km) and vice versa. Includes incline equivalent calculations.

Disclaimer

This calculator provides estimates for informational purposes only and should not be considered medical advice. Individual results may vary based on factors not captured by these formulas. Consult a healthcare professional before making changes to your diet or exercise routine, especially if you have any existing health conditions.