Grams ➝ Kilograms: Simple and Exact
1. Core Formula
kg = g ÷ 1000 (exact). Reverse: g = kg × 1000.
2. Flow
- Enter grams.
- Divide by 1000 (move decimal 3 places left).
- Keep full precision in code; round only for display.
3. Sanity Checks
- 1 g = 0.001 kg
- 250 g = 0.25 kg
- 500 g = 0.5 kg
- 1000 g = 1 kg
- 10,000 g = 10 kg
4. Shortcuts
- Think in kilograms: g / 1000.
- For head math: 1 kg ≈ 2.2 lb; 1 g ≈ 0.035 oz.
5. Pitfalls
- Misplacing the decimal when many zeros are present.
- Rounding too early in chained conversions.
6. Micro Examples
75 g
= 0.075 kg
1200 g
= 1.2 kg
25,000 g
= 25 kg
0.5 g
= 0.0005 kg
7. Mini FAQ
- Exact factor? 1000.
- Best storage? Store as integer grams to avoid float errors, convert to kg for display.
8. Action Tip
When aggregating many items, sum grams as integers, then convert once to kilograms at the end.