What is the cm² to in² Converter?

This tool converts square centimeters to square inches, helping Americans understand metric specifications in familiar terms.

Why Convert to Square Inches?

Products and materials from outside the US typically list dimensions in centimeters, but you may think in inches:

Reading spec sheets — international products show cm² dimensions
Following patterns — European crafting guides use metric
Comparing products — matching foreign items to US standards
Custom orders — converting your needs for international suppliers

The Conversion

1 square centimeter = 0.155 square inches

Or equivalently, about 6.45 cm² equal 1 in². A 100 cm² area (10 × 10 cm) equals about 15.5 in² — roughly a 4" × 4" square.

Practical Reference

A standard A4 paper (624 cm²) equals about 96.7 in², while US Letter paper (603 cm²) equals about 93.5 in² — similar but not identical.

How to Use

Find your cm² measurement — from product specs or calculations
Enter the value — type in the left field
Get square inches — compare with US products or patterns

Reference Conversions

Common metric sizes in US terms:

10 cm² = 1.55 in² — about 1¼" × 1¼"
50 cm² = 7.75 in² — about 2¾" × 2¾"
100 cm² = 15.5 in² — about 4" × 4"
500 cm² = 77.5 in² — about 8¾" × 8¾"
1000 cm² = 155 in² — about 12½" × 12½"

Shopping Internationally

When comparing products from different regions, converting to a common unit prevents confusion. A device with 65 cm² active area equals about 10 in² — now you can compare to US products directly.

Reverse Conversion

Click the swap button (↔) to convert square inches to square centimeters.

Converter Features

Instant Real-Time Conversion

See square inch equivalents as you type. Convert metric product specs for US comparison instantly.

Bidirectional Conversion

Switch between cm² and in² with one click. Work in whichever unit helps you understand the size.

One-Click Copy

Copy US measurements for ordering, comparison shopping, or adapting patterns.

Metric to Imperial Reference

Common metric sizes in US terms:

10 cm² (1.55 in²) - Small component
100 cm² (15.5 in²) - About 4" × 4"
500 cm² (77.5 in²) - About 9" × 9"
1000 cm² (155 in²) - About 12.5" × 12.5"

Mobile-Optimized Design

Convert specifications on your phone when comparing international products or adapting designs.

Frequently Asked Questions

How do I convert square centimeters to square inches?

Divide by 6.4516, or multiply by 0.155. For example, 100 cm² ÷ 6.45 = 15.5 in².

Why don't I just divide by 2.54?

That's for linear measurements. Area conversion requires squaring: cm² ÷ 2.54² = cm² ÷ 6.4516 = in².

How do I visualize cm² in inches?

100 cm² (10 × 10 cm) equals about 4" × 4" (15.5 in²). This reference helps visualize metric product sizes.

Is there quick mental math for this?

Divide by 6.5, or multiply by 0.15. For 50 cm²: 50 × 0.15 = 7.5 in². The exact answer is 7.75 in²—reasonable estimate.

What if my product lists dimensions, not area?

Multiply length × width in cm to get cm², then convert. A 15 × 20 cm item = 300 cm² = 46.5 in² (about 7" × 7").

Does this apply to screen comparisons?

Yes, convert the screen area (not diagonal). A phone with 80 cm² display = 12.4 in² viewable area.

Square Centimeters to Square Inches