Days to Hours Converter

Convert day to hour instantly. 1 d = 24 h, worked steps and a full reference table.

Formula

h = d × 24

How to use it

Type the value in day — the result updates as you type.
Use Swap to flip the direction, or change either dropdown to convert between any two units.
Click the result to copy it. The URL updates too, so you can bookmark or share the exact conversion.

Examples

1 d	24 h
5 d	120 h
10 d	240 h
100 d	2400 h

One day equals 24 hours (h). To convert days to hours, multiply by 24; to go back the other way, multiply by 0.041666667 instead.

The converter above does it as you type and shows the working underneath, so you can check the arithmetic rather than take the number on trust.

What days and hours actually measure

Day (d) — A day is 24 hours. Calendars, project planning and delivery estimates.

Hour (h) — An hour is sixty minutes. Working time, travel and billing.

Days to Hours conversion table

The most common values, worked out in advance. Anything not listed can be typed straight into the converter.

d	h
1 d	24 h
2 d	48 h
5 d	120 h
10 d	240 h
25 d	600 h
50 d	1200 h
100 d	2400 h

How to convert days to hours by hand

Multiply the number of days by 24.

For example, 25 d × 24 = 600 h.

Going the other way, divide by 24 — or multiply by 0.041666667, which is the same thing and easier to do in your head.

Everything runs in your browser

There is no server involved in the calculation. The numbers you type never leave your device, nothing is logged, and the page keeps working with no connection once it has loaded. That is not a marketing line — it is simply how the tool is built, because a calculation like this has no reason to touch a network.

Questions people ask

How many h are in 1 d?

1 d equals exactly 24 h. Multiply any value in day by 24 to get hour.

Is anything uploaded to a server?

No. The whole calculation happens in your browser. Nothing is sent anywhere, and the page keeps working offline once loaded.

Runs entirely in your browser. Nothing you type is uploaded, logged or shared.

Last updated 18 August 2026