Paint Drying Time Calculator
Recoat and cure time adjusted for conditions.
Enter your values
Enter the base recoat time (label, 70f/50% humidity) in hours.
Enter the room temperature in F.
Enter the relative humidity in %.
Results update instantly as you type — no submit needed. Your values are remembered on this device, and the shareable link reopens the calculator with exactly these numbers.
- Adjusted recoat time
- 8.4 hrs
- Full cure time (approx)
- 50.4 hrs
- Temperature factor
- 1.5
- Humidity factor
- 1.4
Quick answer
Drying time roughly doubles for every 20 degrees below ideal temperature or for high humidity above 60%.
adjusted time = base time x temp factor x humidity factor
At a glance
| What it does | Recoat and cure time adjusted for conditions. |
|---|---|
| Category | Everyday |
| Inputs needed | Base recoat time (label, 70F/50% humidity), Room temperature, Relative humidity |
| Main output | Adjusted recoat time |
| Formula | adjusted time = base time x temp factor x humidity factor |
| Cost | Free — no sign-up, no download |
How to use the Paint Drying Time Calculator
- 1Enter the label's base recoat time under ideal conditions.
- 2Enter your actual room temperature and relative humidity.
- 3Cold or humid conditions slow drying, so the adjusted time is longer than the label.
Inputs explained
- Base recoat time (label, 70F/50% humidity)(hours)
- Enter the base recoat time (label, 70f/50% humidity) in hours.
- Room temperature(F)
- Enter the room temperature in F.
- Relative humidity(%)
- Enter the relative humidity in %.
Worked example
Using the values the calculator loads with:
Inputs
- Base recoat time (label, 70F/50% humidity)4 hours
- Room temperature60 F
- Relative humidity70 %
Results
- Adjusted recoat time8.4 hrs
- Full cure time (approx)50.4 hrs
- Temperature factor1.5
- Humidity factor1.4
Frequently asked questions
What's ideal painting weather?
About 70F (21C) and 50% relative humidity or lower dries paint closest to the label time.
Why is cure time so much longer than recoat time?
Recoat means dry enough for another layer; full cure (hard, washable) takes several days for most paints.
What do I need to enter into the Paint Drying Time Calculator?
Just 3 values: base recoat time (label, 70f/50% humidity), room temperature, relative humidity. Every field starts with a realistic example, so you can change one number at a time and watch the result update instantly.
How does the Paint Drying Time Calculator work out the answer?
Drying time roughly doubles for every 20 degrees below ideal temperature or for high humidity above 60%. It applies the formula adjusted time = base time x temp factor x humidity factor and shows the working so you can check each step by hand.
Is the Paint Drying Time Calculator free, and do I need an account?
It is completely free with no sign-up, no download and no usage limit. Everything is calculated in your browser, so the numbers you type never leave your device.
Results are estimates for general information. For medical, legal, structural or financial decisions, confirm with a qualified professional.