PMV Online Calculator

Calculate PMV and PPD to evaluate thermal comfort based on ISO 7730 standards.

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About This Tool

This PMV (Predicted Mean Vote) Online Calculator implements the ISO 7730 standard to predict thermal comfort in indoor environments. It uses six input parameters: air temperature, mean radiant temperature, air velocity, relative humidity, metabolic rate, and clothing insulation. The tool calculates the PMV index (ranging from -3 to +3) and PPD (Predicted Percentage of Dissatisfied), providing insights into thermal sensation and comfort levels. Ideal for HVAC professionals, architects, and building managers to optimize indoor climate.

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How to Use

Enter air temperature in °C.
Enter mean radiant temperature in °C.
Input air velocity in m/s.
Set relative humidity in %.
Select metabolic rate from the dropdown (e.g.,
0 met for seated rest).
Choose clothing insulation from the dropdown (e.g.,
5 clo for summer clothing).
Click 'Calculate PMV' to see results including PMV value, PPD percentage, thermal sensation, and comfort level.

Frequently Asked Questions

Find Quick Answers

What is PMV?

PMV (Predicted Mean Vote) is an index that predicts the mean thermal sensation of a group of people on a scale from -3 (cold) to +3 (hot), with 0 being neutral. It's defined in the ISO 7730 standard.

What does PPD mean?

PPD (Predicted Percentage of Dissatisfied) estimates the percentage of people likely to feel thermally dissatisfied (too hot or too cold) based on the PMV value. Even at PMV=0, PPD is about 5% due to individual differences.

What are typical values for metabolic rate and clothing insulation?

Metabolic rate: 1.0 met for seated rest, 1.2 for office work, 1.6 for walking. Clothing insulation: 0.5 clo for summer clothing, 1.0 for typical business suit, 1.5 for heavy winter clothing.

Is this calculator accurate?

Yes, it follows the ISO 7730:2005 equations for PMV and PPD calculation, ensuring scientific accuracy for standard indoor conditions.

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