21 Rounded to the Nearest Ten

Rounding Calculator

What is 21 rounded to the nearest ten?

Answer

21 rounded to the nearest ten is

20

Nearest ten — the ones digit decides: 5⁠–⁠9 round up, 0⁠–⁠4 keep; digits to the right become 0.

21

2 tens place 1 The ones digit decides

21

20closer 25midpoint 30

1 < 5 → keep 20

21 rounded to every place
Place	Rounded
to the nearest thousandth	21.000
to the nearest hundredth	21.00
to the nearest tenth	21.0
to the nearest whole number	21
to the nearest ten	20
to the nearest hundred	0

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Number 21 Facts

See Also

Square Root Calculator - Calculate the square root of any number
Decimal to Fraction Converter - Convert Decimal to Fraction
Fraction to Decimal Converter - Convert Fraction to Decimal

Recalculate with different values ↑

Numbers rounded to the nearest ten

Number	Rounded
10	10
10.5	10
11	10
12	10
12.5	10
13	10
13.45	10
14	10
15	20
15.159	20
16	20
17	20
18	20
19	20
20	20
21	20
22	20
23	20
24	20
25	30
26	30
27	30
28	30
29	30
30	30
31	30
31.1	30
32	30
33	30
34	30

FAQ

What is 21 rounded to the nearest ten?

21 rounded to the nearest ten is 20

Is 21 closer to 20 or 30?

21 is 1 from 20 and 9 from 30, so it is closer to 20 — that is 21 rounded to the nearest ten.

How many zeros does rounding to the nearest ten leave at the end?

At least 1: every digit right of the tens place becomes 0 and the decimals are dropped — 21 → 20.