Fractional inch
- Inches
- 1.5 in
Result: 3.81 cm
- 1.5 → in × 2.54
- = 3.81 cm
Enter one and a half inches as 1.5. This converts to 3.81 cm; typing a fraction such as 1/2 is not supported in the number field.
Unit Converters
Inches to CM Converter
Convert inches to centimeters instantly with the exact conversion factor.
Reviewed September 2, 2026Formula, example, outputs, and edge-case tests checked by CalcLogicHub.Review methodology
LOCAL CALCULATION
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Result
2.54cm
Formula
in × 2.54Calculation Steps
- 1 → in × 2.54
- = 2.54 cm
Your calculations are processed locally and are not stored.
Quick answer
Multiply inches by 2.54 to get centimeters. One international inch is exactly 2.54 cm, so 10 inches equals 25.4 cm.
Formula · Worked example · Units and assumptions · Questions and answers
How to Calculate
- Enter a length in inches.
- The converter multiplies the value by 2.54.
- Copy the result or switch to centimeters-to-inches.
Formula
Centimeters = inches × 2.54Example
10 inches × 2.54 = 25.4 cm.
Units, assumptions, and limitations
- Enter a non-negative length in decimal inches.
- Convert a fraction to a decimal first: 1½ inches is entered as 1.5.
Common mistake to avoid
Entering feet in the inch field. Five feet is 60 inches, which equals 152.4 cm.
Explanations updated . See the calculation methodology for precision and review details.
Practical examples & result interpretation
Use the matching example buttons in the calculator to load these inputs. The scenarios are illustrative, not personal advice or real customer records.
Feet converted to inches first
- Inches
- 60 in
Result: 152.4 cm
- 60 → in × 2.54
- = 152.4 cm
Five feet is 60 inches, giving 152.4 cm. Do not enter 5 in the inches field when the source measurement is in feet.
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Unit Conversion Factors, Area, Temperature & Sensible Rounding
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Read the guide →Frequently Asked Questions
How many centimeters are in one inch?
There are exactly 2.54 centimeters in one inch.
How do I convert inches to centimeters?
Multiply the inch value by 2.54.
Is the conversion exact?
Yes. The international inch is defined as exactly 2.54 centimeters.
Reference sources
Authoritative material used to check the formula, definition, or interpretation shown on this page: