---
title: "Days to Hours — d to h converter"
description: "1 day = 24 hours. Convert days to hours with a full conversion table, the exact formula, and a calculator for any value."
url: https://atoneplace.net/convert/days-to-hours/
site: "At One Place"
---

# Days to hours

**1 day in hours: 1 d = 24 h**

h = d × 24

To convert days to hours, multiply by 24. The table below gives the values people look up most often, and the converter works for any number.

## Days to hours table

*Common day values converted to hours.*

| Days | Hours |
| --- | --- |
| 1 d | 24 |
| 2 d | 48 |
| 3 d | 72 |
| 4 d | 96 |
| 5 d | 120 |
| 10 d | 240 |
| 15 d | 360 |
| 20 d | 480 |
| 25 d | 600 |
| 30 d | 720 |
| 40 d | 960 |
| 50 d | 1,200 |
| 75 d | 1,800 |
| 100 d | 2,400 |
| 250 d | 6,000 |
| 500 d | 12,000 |
| 1,000 d | 24,000 |

## How the conversion works

The relationship is h = d × 24. Both units measure time, so the conversion is a fixed factor that never changes.

## Common questions

### How many hours are in one day?

One day equals 24 hours. h = d × 24.

### How do you convert days to hours?

Use h = d × 24. So 10 d is 240 h.

### How many days are in one hour?

One hour equals 0.041667 days, which is the reverse of the conversion above.

## Related pages

- [Hours to Days](https://atoneplace.net/convert/hours-to-days/)
- [Days to Seconds](https://atoneplace.net/convert/days-to-seconds/)
- [Days to Milliseconds](https://atoneplace.net/convert/days-to-milliseconds/)
- [Days to Minutes](https://atoneplace.net/convert/days-to-minutes/)
- [Days to Weeks](https://atoneplace.net/convert/days-to-weeks/)
- [Days to Months](https://atoneplace.net/convert/days-to-months/)
- [Days to Years](https://atoneplace.net/convert/days-to-years/)

## Sources

- Guide for the Use of the International System of Units (SP 811) — NIST (https://www.nist.gov/pml/special-publication-811) [Public domain (US Government)]
- The International System of Units (SI Brochure) — Bureau International des Poids et Mesures (https://www.bipm.org/en/publications/si-brochure)
- Calculated on this page — At One Place (/about/)