📖 Overview
Enter a value and type 1 for cm to inches 2 for kg to lbs 3 for Celsius to Fahrenheit or 4 for km to miles.
🧪 Example Scenarios
Use these default and higher-pressure example inputs to explore how sensitive this calculator is before using your real numbers.
| Input | Base Case | Higher Pressure Case |
|---|---|---|
| Value | 0 | 0 |
| Type (1=cm-in 2=kg-lb 3=C-F 4=km-mi) | 100 | 115 |
⚙️ How It Works
Converts a value between four of the most commonly needed unit pairs using a conversion type code. Type 1 = cm to inches/feet, 2 = kg to pounds/ounces, 3 = Celsius to Fahrenheit/Kelvin, 4 = km to miles.
The Formula
| Type 1 | cm ÷ 2.54 = inches | cm ÷ 30.48 = feet |
| Type 2 | kg × 2.20462 = pounds | kg × 35.274 = ounces |
| Type 3 | (°C × 9/5) + 32 = °F | °C + 273.15 = Kelvin |
| Type 4 | km × 0.621371 = miles |
Quick Reference
| Value | Inches | Feet | Meters |
|---|---|---|---|
| 30 cm | 11.81 in | 0.98 ft | 0.30 m |
| 60 cm | 23.62 in | 1.97 ft | 0.60 m |
| 100 cm | 39.37 in | 3.28 ft | 1.00 m |
| 180 cm | 70.87 in | 5.91 ft | 1.80 m |
When To Use This
- Use this tool when you need a fast decision during active planning or execution.
- Use this before committing money, time, or tradeoffs that are hard to reverse.
- Use this to compare options using the same assumptions across scenarios.
Edge Cases To Watch
- Results can be misleading if key inputs are missing, stale, or unrealistic.
- Very small or very large values may amplify rounding effects and interpretation risk.
- If assumptions change mid-decision, recalculate before acting.
Practical Tips
Frequently Asked Questions
❓ Can I convert in the reverse direction?
Yes — enter the target value and pick the appropriate type. For example, 1 inch = 2.54 cm, so enter 2.54 with type 1 to confirm.
❓ Why not more unit types?
These four cover the vast majority of everyday conversions. More specialised conversions (fluid oz, stone, etc.) are better served by dedicated tools.