4 centimeters to inches
1.57 in
4 cm = 1.57 in.
inches
1.57in
4 cm = 1.57 in
The short answer
How many inches is 4 centimeters?
4 cm = 1.57 in. 1 centimeter = 0.393701 inches, so the working is 4 × 0.393701 = 1.57.
To the nearest 1/16 that is 1 9/16 in.
The working
The factor below is an exact definition rather than a measurement, so nothing is approximated in the arithmetic. The only rounding on this page happens where a number is displayed.
1 centimeter = 0.393701 inches 4 × 0.393701 = 1.57
How much precision do you need?
Each row is the same answer cut at a different number of decimals, with what that choice costs you. Pick the shortest row whose error is smaller than whatever you are measuring with.
| Rounded to | Answer (in) | Off by |
|---|---|---|
| Whole number | 2 | +0.42520 |
| 1 decimal | 1.6 | +0.02520 |
| 2 decimals | 1.57 | −0.00480 |
Round trip: take 1.57 in back the other way and you land on 3.9878 cm — a drift of 0.0122 cm. That gap is the rounding, not the conversion.
What 4 cm looks like
4.30 cm
Under R&A and USGA rules a golf ball must be at least 42.67 mm in diameter.
Frequently asked questions
What is 4 centimeters in inches?
4 centimeters is 1.57 inches. 1 centimeter = 0.393701 inches, so the working is 4 × 0.393701 = 1.57.
What is 4 centimeters as a fraction?
To the nearest 1/16, 4 centimeters is 1 9/16 in. That is 0.0123 in under the exact value — well inside what a tape measure can resolve.
How accurate is 1.57 in?
Rounding to 1.57 in and converting straight back gives 3.9878 cm, a drift of 0.0122 cm from the 4 you started with. The factor itself is exact; every bit of that difference comes from the rounding, not the conversion.
Nearby values
Any value at all
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