686 ft ≈ 685.999 US survey ft. To convert feet to us survey feet, multiply by 0.999998: 686 × 0.999998 = 685.999.
How to convert feet to us survey feet
US survey ft = ft × 0.999998
- 1 ft = 0.999998 US survey ft (and 1 US survey ft = 1.000002 ft).
- Multiply the amount by the factor: 686 × 0.999998 = 685.999.
- Answer: 686 ft ≈ 685.999 US survey ft (rounded to 6 significant figures).
Feet to US Survey Feet table
| Feet (ft) | US Survey Feet (US survey ft) |
|---|---|
| 681 ft | 680.999 US survey ft |
| 682 ft | 681.999 US survey ft |
| 683 ft | 682.999 US survey ft |
| 684 ft | 683.999 US survey ft |
| 685 ft | 684.999 US survey ft |
| 686 ft | 685.999 US survey ft |
| 687 ft | 686.999 US survey ft |
| 688 ft | 687.999 US survey ft |
| 689 ft | 688.999 US survey ft |
| 690 ft | 689.999 US survey ft |
| 691 ft | 690.999 US survey ft |
| ft | US survey ft |
|---|---|
| 1 ft | 0.999998 US survey ft |
| 5 ft | 5 US survey ft |
| 10 ft | 10 US survey ft |
| 50 ft | 49.9999 US survey ft |
| 100 ft | 99.9998 US survey ft |
| 1,000 ft | 999.998 US survey ft |
Good to know
1 inch = 2.54 cm exactly; 1 cm = 10 mm; 1 m = 100 cm; 1 foot = 12 inches = 30.48 cm.