Transpiration Rate Calculator
Calculate plant transpiration rate from water loss, leaf area, and time.
Transpiration Rate measurements
Enter your values, then calculate.
Result
How to calculate transpiration rate
This calculator finds plant transpiration rate by dividing water loss by the product of leaf area and time.
How the calculation works
Transpiration rate = Water loss ÷ (Leaf area × Time).
Example
15g of water lost by 0.3 m² of leaf area over 3 hours: 15÷(0.3×3) = 15÷0.9 ≈ 16.7 g per m² per hour.
Frequently asked questions
How is Result calculated?
Result = [Water loss] ÷ ([Leaf area] × [Time]).
Is the Transpiration Rate Calculator free to use?
Yes — every calculator on Simple Calculator Tools is free, runs in your browser, and does not require an account.
Transpiration Rate Calculator
Transpiration rate = Water loss ÷ (Leaf area × Time).
Let's understand your transpiration rate result.
Calculate a result above and this guide will help you interpret it using this calculator's own formula and explanation.
Pro Tips for Transpiration Rate
- Transpiration rate varies significantly with humidity, temperature, light, and wind — note these conditions when comparing measurements across trials.
- This normalizes water loss by both leaf area and time, allowing comparison across plants of different sizes and measurement durations.
Common Transpiration Rate Mistakes to Avoid
- Comparing raw (non-normalized) water loss between plants of very different leaf sizes without dividing by area, which isn't a fair comparison of transpiration rate.
When to Use This Calculator
This calculator finds plant transpiration rate by dividing water loss by the product of leaf area and time.