Direct conversion
Convert teaspoon (US) [tsp US] to acre-foot [ac ft] instantly with formula, examples, chart, and FAQs.
1 teaspoon (US) [tsp US] = 3.995942E-9 acre-foot [ac ft]
1 teaspoon (US) [tsp US] = 3.995942E-9 acre-foot [ac ft]
Example: 1 teaspoon (US) [tsp US] equals 3.995942E-9 acre-foot [ac ft].
Volume conversions use cubic metre as the reference unit. US liquid units, metric litres, and cubic units are converted with fixed factors stored in the unit table.
Displayed results are rounded for readability. The calculator keeps enough precision for everyday use and switches to scientific notation for very large or very small values. Last reviewed: 2026-08-14.
The teaspoon (US) (tsp US) is a volume unit used to express measurements in this converter.
HistoryThis unit is included because it appears in practical measurement systems, technical references, product specifications, or everyday conversion needs.
Current useUse teaspoon (US) when comparing volume values, checking specifications, converting between systems, or preparing quick estimates.
The acre-foot (ac ft) is a volume unit used to express measurements in this converter.
HistoryThis unit is included because it appears in practical measurement systems, technical references, product specifications, or everyday conversion needs.
Current useUse acre-foot when comparing volume values, checking specifications, converting between systems, or preparing quick estimates.
| teaspoon (US) [tsp US] | acre-foot [ac ft] |
|---|---|
| 1 | 3.995942E-9 |
| 2 | 7.991884E-9 |
| 5 | 1.997971E-8 |
| 10 | 3.995942E-8 |
| 20 | 7.991884E-8 |
| 25 | 9.989854E-8 |
| 50 | 1.997971E-7 |
| 100 | 3.995942E-7 |
| 1000 | 0.000004 |
Use this formula: 1 teaspoon (US) [tsp US] = 3.995942E-9 acre-foot [ac ft] Enter your value in the calculator and the result updates instantly.
1 teaspoon (US) [tsp US] equals 3.995942E-9 acre-foot [ac ft].
Yes. Use the swap button in the calculator or open the related reverse conversion link when it is listed on this page.