How many electronvolts is 1 BTU?

1 BTU (IT) equals approximately 6.5851 × 10²¹ electronvolts (eV). This enormous number reflects the scale difference: the electronvolt is an atomic-scale unit (~1.602 × 10⁻¹⁹ J), while 1 BTU equals about 1055 joules — enough energy to raise one pound of water by 1 °F.

How do I convert BTU to eV manually?

Multiply the BTU value by 6.5851 × 10²¹. For example, 2 BTU × 6.5851 × 10²¹ = 1.317 × 10²² eV. To convert eV back to BTU, divide by 6.5851 × 10²¹ (or multiply by approximately 1.5189 × 10⁻²² BTU/eV).

What is an electronvolt?

An electronvolt (eV) is the amount of kinetic energy gained by a single electron accelerating through a potential difference of one volt. It equals exactly 1.602176634 × 10⁻¹⁹ joules. It is the standard energy unit in atomic, molecular, and particle physics.

Why would I convert BTU to eV?

This conversion is useful in interdisciplinary work bridging engineering thermodynamics (where BTU is common in the US) and atomic or molecular physics (where eV is standard). For example, when comparing thermal energy to bond dissociation energies or photon energies.

What is the BTU (IT) definition used here?

The International Table BTU (BTU IT) equals exactly 1055.05585262 joules. This is the most common BTU definition in engineering and commerce. Given 1 eV = 1.602176634 × 10⁻¹⁹ J, 1 BTU IT = 1055.05585262 / 1.602176634 × 10⁻¹⁹ ≈ 6.5851 × 10²¹ eV.

How many BTU is 1 eV?

1 eV = 1.602176634 × 10⁻¹⁹ J ÷ 1055.05585262 J/BTU ≈ 1.5189 × 10⁻²² BTU. A single electronvolt is an extremely small fraction of a BTU, illustrating the vast energy scale difference between atomic and macroscopic phenomena.

BTU to Electronvolts Converter

Name: BTU to Electronvolts Converter
Availability: InStock
Author: Nham Vu

Enter a value in BTU and get the electronvolt equivalent instantly, with reverse eV-to-BTU conversion and a common reference table.

Converter

Energy in BTU (British Thermal Units)

Result in electronvolts (eV)

Reverse: electronvolts to BTU

Energy in electronvolts (eV)

Result in BTU

Reference Table

BTU Electronvolts (eV)

0.001 BTU 6.585 × 10¹⁸

0.01 BTU 6.585 × 10¹⁹

0.1 BTU 6.585 × 10²⁰

1 BTU 6.585 × 10²¹

2 BTU 1.317 × 10²²

5 BTU 3.293 × 10²²

10 BTU 6.585 × 10²²

50 BTU 3.293 × 10²³

100 BTU 6.585 × 10²³

500 BTU 3.293 × 10²⁴

1,000 BTU 6.585 × 10²⁴

10,000 BTU 6.585 × 10²⁵

Formula: eV = BTU × 6.5851×10²¹ • BTU = eV ÷ 6.5851×10²¹

Summary

Enter a value in BTU and get the electronvolt equivalent instantly, with reverse eV-to-BTU conversion and a common reference table.

How it works

Enter an energy value in BTU in the top input field.
The electronvolt result appears instantly — no button press needed.
Use the reverse field to convert electronvolts back to BTU.
Click "Copy" next to any result to copy the value to your clipboard.
Check the reference table for common BTU-to-eV values at a glance.

Use cases

Convert macroscopic energy values (furnace output, AC capacity) to the atomic scale in eV for physics comparisons.
Translate BTU thermal data to electronvolts when working with quantum chemistry or spectroscopy references.
Cross-check energy scales between imperial engineering data and particle physics literature.
Convert BTU energy input to eV for semiconductor or materials science calculations.
Understand the scale difference between everyday energy (BTU) and atomic-bond energies (eV) in education.
Verify unit conversions in interdisciplinary research combining thermodynamics and atomic physics.

Frequently Asked Questions

Last updated: 2026-07-22 · Reviewed by Nham Vu