⚡ Energy

therms to BTU Converter

Convert therms to BTU instantly: 1 therms = 100000 BTU. Free converter with the formula, a reference table and FAQs — no sign-up.

Quick answer: To convert therms to BTU, multiply by 100000. For example, 1 therms = 100000 BTU. Use the calculator below for any value.
therms to BTU
→
Common conversions
therms BTU
Formula:

How to convert therms to BTU

1

Enter your value

Type the number of therms you want to convert into the left box. The result in btu appears instantly in the right box. You can also type into the right box to convert in the other direction.

2

Use the swap button

Click the ⇄ Swap button to reverse the conversion — BTU to therms. Your current value carries across so you don't have to re-enter anything.

3

About therms and BTU

therms and BTU are common energy measurements.

Worked examples: therms to BTU

Multiply the therms value by 100,000 to get BTU. A few quick examples:

  • 5 therms × 100,000 = 500,000 BTU
  • 25 therms × 100,000 = 2.5e+06 BTU
  • 250 therms × 100,000 = 2.5e+07 BTU
📊 Common conversions at a glance
therms BTU
1e-05 1
0.001 100
0.01 1000
0.1 1e+04
0.5 5e+04
1 1e+05
Reviewed for 2026. therms ↔ BTU conversion factor verified against published reference data. Built by a UK-based qualified primary teacher and FA Level 2 coach as part of 247QuickTools' free utility-tools project.

Frequently asked questions

How do I convert therms to BTU?

To convert therms to BTU, multiply by 100000. Or use the calculator above for instant results.

How many BTU are in 1 therms?

1 therms equals 100000 BTU.

Is the therms to BTU converter free?

Yes, the therms to BTU converter is completely free with no sign-up required, no downloads, and it works offline once the page has loaded.