Years to Days Converter (yr to d)
Convert years to days instantly. 1 yr = 365 d. Includes the formula, a full conversion table and a calculator that works offline.
The formula
To convert years to days, multiply by 365:
d = yr × 365Going the other way, divide instead — or multiply by 0.00274, which is the same thing:
yr = d × 0.00274Years to Days conversion table
| Years | Days |
|---|---|
| 1 yr | 365 d |
| 2 yr | 730 d |
| 3 yr | 1,095 d |
| 4 yr | 1,460 d |
| 5 yr | 1,825 d |
| 6 yr | 2,190 d |
| 7 yr | 2,555 d |
| 8 yr | 2,920 d |
| 9 yr | 3,285 d |
| 10 yr | 3,650 d |
| 15 yr | 5,475 d |
| 20 yr | 7,300 d |
| 25 yr | 9,125 d |
| 30 yr | 10,950 d |
| 40 yr | 14,600 d |
| 50 yr | 18,250 d |
| 75 yr | 27,375 d |
| 100 yr | 36,500 d |
| 250 yr | 91,250 d |
| 500 yr | 182,500 d |
| 1000 yr | 365,000 d |
Days to Years
| Days | Years |
|---|---|
| 1 d | 0.00274 yr |
| 2 d | 0.005479 yr |
| 3 d | 0.008219 yr |
| 4 d | 0.011 yr |
| 5 d | 0.0137 yr |
| 6 d | 0.0164 yr |
| 7 d | 0.0192 yr |
| 8 d | 0.0219 yr |
| 9 d | 0.0247 yr |
| 10 d | 0.0274 yr |
What that actually looks like
A conversion factor is hard to judge on its own. These are quantities most people already have a feel for, converted for you:
- A mortgage runs 25 years — 9,125 d
- A decade is 10 years — 3,650 d
Why both units are still in use
Time conversions look trivial until months and years get involved. A month is not a fixed length, and a year is 365 days except when it is 366. This page uses 365-day years and 30-day months, which is the convention for rough planning; for contracts, interest or anything legal, count the actual calendar days.
Mistakes worth avoiding
Working days are not calendar days. A 30-day payment term is calendar days unless the contract says otherwise, which is roughly 21 working days — a gap large enough to miss a deadline over.
The other habit worth breaking is rounding too early. Convert first, round once at the end, and you avoid the drift that turns a small approximation into a visible error by the third calculation.
Doing it in your head
When you only need a rough answer, there is nothing to approximate — the factor is the whole number 365, so multiply and you have the exact answer. Ten years is 3,650 days. An estimate is enough for deciding whether something will fit or whether a figure sounds plausible. When the number has to be right — because you are buying, cooking or building to it — use the calculator and let it carry the decimals.
Common questions
How many days are in one year?
One year equals 365 days. The calculator above handles any value, including decimals and very large numbers, and updates as you type.
Is this an exact conversion?
The factor is accurate to the precision shown, which is far beyond what any practical measurement requires. The table rounds for readability; the calculator does not.
Does this work offline?
Yes. The conversion runs in your browser with no network request, so it works on a plane, in a basement, or on a phone with no signal once the page has loaded.