300°F to Celsius: What 300 Degrees Fahrenheit Equals
Convert 300°F to Celsius: 300 degrees Fahrenheit equals 148.89°C. Learn the formula and what a slow-oven 300°F setting means.
Why 300°F Comes Up
Three hundred degrees Fahrenheit is a slow-oven temperature used for roasting vegetables, baking casseroles, and gentle baking. The Celsius value is a kitchen reference.
The answer is 148.89°C. Our Fahrenheit to Celsius converter returns it directly; 148.89°C is the rounded figure.
The 300°F to Celsius Formula
To convert Fahrenheit to Celsius, subtract 32, then multiply by 5/9. The minus 32 lines up the zero points, since water freezes at 32°F but 0°C.
The Exact Calculation
Start with (300 - 32) = 268. Then 268 × 5/9 = 1340/9 = 148.888...°C, rounded to 148.89°C.
The same pattern works for any Fahrenheit value: subtract 32, then multiply by 5/9.
Where 300°F Appears
This temperature is the upper-slow end on many US stoves, used for roasting and slow baking. It is well above the 100°C boiling point of water.
What 148.89°C Means in the Kitchen
At 148.89°C (300°F), food roasts steadily with light browning, a dependable setting for vegetables and baked dishes. It is a common slow-roast anchor on US oven dials.
For the next oven step up, our guide to 325°F to Celsius covers the moderate-slow range.
300°F Compared With Nearby Temperatures
Nearby values: 250°F is 121.11°C, 325°F is 162.78°C, and 350°F is 176.67°C. Each Fahrenheit degree is 5/9 of a Celsius degree.
In the oven, 300°F is the slow end, a useful anchor when switching between US and metric recipes.
When You Need 300°F in Celsius
The conversion matters for roasting. A US recipe at 300°F is 148.89°C on a metric oven; a metric recipe at 150°C is close to 302°F.
It also helps when a European appliance lists 150°C and you want the Fahrenheit figure for a US dial.
Frequently Asked Questions
What is 300°F in Celsius?
300°F equals 148.89°C, calculated as (300 - 32) × 5/9 = 148.888...°C.
Is 300°F a slow oven temperature?
Yes. 300°F (148.89°C) is the slow end of roasting, used for vegetables and casseroles.
How do I convert 300°F to Celsius?
Subtract 32 from 300 to get 268, then multiply by 5/9 to get 148.89°C.
What is 300°F in Celsius for baking?
300°F is 148.89°C, the slow-roast and gentle-bake range.
How does 300°F compare with 350°F?
350°F is 176.67°C, so 300°F (148.89°C) is 27.78°C cooler, a slower setting.
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Quick Summary
300°F equals 148.89°C. Use Celsius = (Fahrenheit - 32) × 5/9: (300 - 32) × 5/9 = 148.89°C. It is a slow-oven temperature for steady roasting.
Related Guide
325°F to Celsius: What 325 Degrees Fahrenheit Equals
Convert 325°F to Celsius: 325 degrees Fahrenheit equals 162.78°C. Learn the formula and what a moderate-slow 325°F oven setting means.
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Disclaimer
Unit conversions on this site use internationally recognized, fixed conversion factors (for example, 1 inch = 2.54 cm, 1 pound = 0.45359237 kg, 1 °F = (°C × 9/5) + 32). They are provided for general, informational, and educational use. For applications where accuracy is critical — such as medical dosing, engineering, scientific research, trade, or legal compliance — always verify results against authoritative sources such as the U.S. National Institute of Standards and Technology (NIST) and the official International System of Units (SI) brochure, and follow any applicable local standards.
Exact Constants & Authoritative Sources
Every conversion on this page uses the fixed, internationally agreed constants below — drawn from NIST and the SI Brochure. No values are estimated or rounded as if exact. See the full list on our Sources & Standards page.
- EXACT°F = °C × 9/5 + 32 (exact linear relation)
- EXACT°C = (°F − 32) × 5/9 (exact inverse relation)
- EXACTKelvin (K) = °C + 273.15 (exact offset)
- EXACTWater freezes at 0 °C = 32 °F and boils at 100 °C = 212 °F
Common Pitfalls & How to Avoid Them
Subtract 32 BEFORE multiplying
°C = (°F − 32) × 5/9. Doing 5/9 × °F − 32 instead gives a wrong answer because the offset must be removed first. Parentheses matter.
Degrees are not the same size
A 1 °C step equals a 1.8 °F step. A "10-degree" forecast difference is 18 °F, not 10 °F. This is why a 5 °C day feels very different from a 15 °C day.
Negative signs
Below freezing, (°F − 32) is negative; keep the sign through the whole calculation. −40 °C = −40 °F is the only point where the two scales meet.
A unit-conversion reference site has no manufacturer-specific or device calibration parameters, so "layered tuning" does not apply here. The only real error-handling is input validation: the converter rejects non-numeric, empty, or out-of-range entries and shows a clear message, then falls back to exact constants above. No estimated or rounded figures are ever presented as exact.
Authoritative sources for this page
- NIST (U.S. National Institute of Standards and Technology) — NIST — SI Units: Temperature
Last Updated 2026 | This article was reviewed for accuracy