Temperature Difference Converter

Convert temperature gaps between C deg, K, and F deg.

What it does

Temperature gaps convert differently than readings. A rise of 10 Celsius degrees is 18 Fahrenheit degrees, with no 32 to add. Kelvin gaps match Celsius gaps one to one.

The tool above converts among C deg, K, and F deg differences. The defaults convert 10 C deg, so the page opens showing 18 F deg. Pick new units to update the result.

Absolute readings need offsets: F = C x 9/5 + 32. Gaps cancel offsets, leaving scale only: F deg = C deg x 9/5. That is why weather swings and lab tolerances use this tool, not the absolute converter.

Use C deg or K for science spans, F deg for US spans. Reactor deltas, bridge expansion joints, and thermostat bands all live here.

This page shows the factors, one full hand checked example at 10 C deg, a reference table, and practice checks that run through the tool.

How to use

1. Type the gap number.
2. Pick the starting gap unit.
3. Pick the target gap unit.
4. Read the main result.
5. Do not add 32 here.
6. For readings use an absolute converter.

Formula

C deg

Celsius degree difference.

K

Kelvin difference, same as C deg.

F deg

Fahrenheit degree difference.

Absolute converter adds 32 and scales. Difference converter scales only.

Worked example

Reference table

Limits

• Gaps only. Readings need absolute tool.
• No 32 offset here by design.
• Linear scales only.
• Four decimals suit labs.

Common mistakes

• Adding 32 to gaps.
• Using absolute converter for spans.
• Mixing C deg with C readings.
• Forgetting K gaps equal C gaps.
• Rounding before scaling.

Try it yourself

Quick checks. Answers sit tucked under each question.

Questions

Sources

• BIPM: SI Brochure
• NIST: Metric SI Program

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