Calculator
What the Tennis Calorie Calculator does
Tennis Calorie Calculator: calculates Calories Burned, Burn Rate (kcal/hour) and MET Used from Your Weight, Duration and Intensity (MET). Example: your weight 70 kg, duration 30 minutes and intensity (MET) 7 gives calories burned 245.
Calories Burned, Burn Rate (kcal/hour) and MET Used, derived from Your Weight, Duration and Intensity (MET). The result recalculates on every keystroke without a button press or a page reload.
It is mostly used by people tracking a goal. Context matters more than the number itself. Age, build and activity all shift it.
Nothing leaves the tab. You can watch your browser network panel while you use it and see for yourself.
If you want to check the arithmetic, the field table, the method and a worked example are further down.
What do the Tennis Calorie Calculator fields mean?
The Tennis Calorie Calculator uses 3 inputs. The defaults are there to be replaced. They exist so the tool is never showing an empty result.
| Field | What to enter | Default |
|---|---|---|
| Your Weight | measured in kg; accepts 30 to 200 | 70 |
| Duration | measured in minutes; accepts 1 to 480 | 30 |
| Intensity (MET) | accepts 1 to 20 | 7 |
How does the Tennis Calorie Calculator work?
Each output is derived from the inputs above in a single pass; there is no hidden state carried between runs, so the same inputs always give the same calculation.
The tool refuses to guess: if a value is missing or impossible, it says so.
Worked example
These are the values the Tennis Calorie Calculator loads by default, and the result it produces from them. These are the tool’s own default values and the result they produce, not an invented illustration.
| Your Weight | 70 kg |
|---|---|
| Duration | 30 minutes |
| Intensity (MET) | 7 |
| Calories Burned | 245 |
|---|---|
| Burn Rate (kcal/hour) | 490 |
| MET Used | 7.0 |
| Summary | About 245 kcal burned in 30 min of Tennis. |
MET values for tennis
Singles tennis at MET 8 is comparable to moderate running. Doubles drops to 6.0, mostly because each player covers far less court.
| Tennis | MET | 30 min at 70 kg |
|---|---|---|
| Doubles | 6.0 | 221 kcal |
| General play | 7.3 | 268 kcal |
| Singles | 8.0 | 294 kcal |
MET values are from the 2011 Compendium of Physical Activities (Ainsworth et al., Med Sci Sports Exerc 43(8):1575-81). One MET is the energy cost of sitting quietly, roughly 3.5 ml of oxygen per kilogram per minute.
What changes the number
- Ball in play is typically only 15-20% of match duration, which is why the average sits below rally intensity.
- Surface matters: clay produces longer rallies and higher totals than grass.
- Serving is intense but brief, and contributes less to the total than its effort suggests.
These figures are population averages. Individual variation of 10–20% is normal, and the compendium itself is drawn from studies with modest sample sizes. Use the result to compare activities against each other, which it does well, rather than as an exact measure of what you personally burned.
How to use it
- Fill in Your Weight in kg (30 to 200).
- Type Duration in minutes (1 to 480).
- Enter Intensity (MET) (1 to 20).
- Watch the results panel as you type: it recalculates on every keystroke.
- The panel reports Calories Burned, Burn Rate (kcal/hour), MET Used and Summary.
- Both Copy Link and Print capture the current state, so pick whichever suits how you file things.
What this tool does not do
- Population-level formulas cannot account for medical conditions, medication or pregnancy.
- This is a screening estimate, not a diagnosis.
- The output is a number, not a judgement. Deciding what it means is still your job.
- The tool cannot tell whether a number was entered in the unit you intended, so double-check the labels.
Frequently asked questions
Enter Your Weight in kg and Duration in minutes. The unit is shown beside each box, and the result carries its own label, so there is nothing to convert by hand.
Your Weight accepts 30 to 200 kg. If a value falls outside, the tool says which field is at fault instead of guessing.
With the values loaded when the page opens, calories burned comes out as 245. It recalculates the moment an input changes, which makes comparing scenarios quick.
Nothing is stored. The page has no back end to send data to, and holds your input only in memory.
It costs nothing, and there is no limit on repeat use.
Good enough to track a trend over time, not precise enough to act on a single reading. Repeat measurements under the same conditions tell you far more than one number does.