68 Fahrenheit to Celsius
68 °F equals 20 °C. Change the value, swap Celsius and Fahrenheit, or copy the result with its formula.
Best solution
Default conversion: 68 °F is 20 °C; exact result: 20 °C.
Temperature reading · up to 2 decimal places
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Calculation for 68 °F
(68 − 32) × 5/9 = 36 × 5/9 = 20 °C.
For this input, 20 °C is exact; no decimal rounding is needed.
For a temperature reading, use °F = °C × 9/5 + 32, or °C = (°F − 32) × 5/9. Results are displayed to at most two decimal places. Negative values are allowed down to −273.15 °C or −459.67 °F (absolute zero). The calculator converts readings, not temperature changes: a change of 1 °C is a change of 1.8 °F, with no 32-degree offset. NIST temperature conversion reference.
Changing the input updates the calculator only; the worked example below it stays on the value named in this page. Swap uses the displayed, rounded result as the next input, so repeated swaps may introduce a small rounding difference. Unit conversion does not determine a diagnosis or a recommended device setting.
Real-World Context & Technical Standards
ISO Standard Metrology Room Temperature
68 °F represents exactly 20.0 °C, the internationally standardized temperature used in laboratories, calibration benches, and machine shops.
WHO Recommended Indoor Heating Target
The World Health Organization identifies 68 °F (20 °C) as the ideal healthy winter indoor ambient temperature for sedentary household members.
Related conversions
Frequently Asked Questions
How do I convert 68 °F to °C?
(68 − 32) × 5/9 = 36 × 5/9 = 20 °C.
Is 20 °C exact or rounded?
For this input, 20 °C is exact; no decimal rounding is needed.