Hydrometer Temperature Correction Calculator
Correct a hydrometer specific gravity reading for temperature deviation from the calibration point (60°F/15.6°C).
Hydrometer Reading
The number shown on your hydrometer (typically 0.990–1.150)
Temperature of the liquid sample when you took the reading
Check your hydrometer label — 60°F is the most common
Enter a reading and temperature to get your corrected SG
Quick Reference — Common Corrections (cal. 60°F)
| Temp (°F) | Temp (°C) | Add to reading |
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Summary
Correct a hydrometer specific gravity reading for temperature deviation from the calibration point (60°F/15.6°C).
How it works
- Enter the specific gravity reading shown on your hydrometer.
- Enter the actual temperature of the liquid sample in °F or °C.
- Select the calibration temperature your hydrometer was built for (default 60°F).
- The calculator applies the standard polynomial correction formula.
- Read the corrected SG — this is the true specific gravity of your sample.
Use cases
- Correcting wort SG readings taken while the wort is still hot after the boil.
- Measuring must gravity accurately during a warm fermentation.
- Verifying final gravity when chilling is not yet complete.
- Getting precise readings from a hydrometer calibrated at 20°C (68°F) instead of 60°F.
- Cross-checking refractometer readings against hydrometer data at varying temperatures.
- Calculating accurate alcohol by volume (ABV) using corrected OG and FG values.
Frequently Asked Questions
Last updated: 2026-07-01 ·
Reviewed by Nham Vu