This converter turns imperial fluid ounces into teaspoons instantly, using the exact factor 1 imperial fluid ounce = 5.764559642 teaspoons. Type any number and the result updates as you go — nothing is sent to a server, so the arithmetic happens entirely in your browser.
The UK fluid ounce, about 4% smaller than its US counterpart. The smallest standard kitchen measure, 4.93 millilitres.
Because the relationship is a simple proportion, one multiplication does the whole job. The table further down gives pre-computed values for the amounts people look up most often, and the result panel also reports the reverse conversion so you can check the figure both ways.
The formula
imperial fluid ounces- The amount you are converting, measured in imperial fluid ounces
5.764559642- The exact number of teaspoons in one imperial fluid ounce
teaspoons- The converted result
How it works, step by step
- Enter the number of imperial fluid ounces you want to convert.
- The value is multiplied by 5.764559642, the exact conversion factor.
- The result is displayed in teaspoons, rounded for readability.
- The unrounded value and the reverse conversion appear underneath so you can verify it.
Worked examples
Converting 5 imperial fluid ounces
Multiply 5 by 5.7645596. That gives 28.8228 teaspoons. A quick sanity check: one imperial fluid ounce is larger than one teaspoon, so the number should get bigger — and it does.
Converting 72 imperial fluid ounces
72 × 5.7645596 = 415.0483 teaspoons. Working backwards, 415.0483 ÷ 5.7645596 returns 72 imperial fluid ounces, which confirms the factor is applied the right way round.
How to read your score
Frequently asked questions
How many teaspoons are in one imperial fluid ounce?
Exactly 5.764559642. Every conversion on this page is that single number multiplied by your input, so the result carries no rounding error beyond what is shown.
What is the formula to convert imperial fluid ounces to teaspoons?
Teaspoons = imperial fluid ounces × 5.764559642. To reverse it, divide instead: imperial fluid ounces = teaspoons ÷ 5.764559642, which is the same as multiplying by 0.1734737885.
Is the imperial fluid ounce bigger than the teaspoon?
Yes. One imperial fluid ounce equals 5.76456 teaspoons, so it is the larger unit.
Why does my answer differ slightly from other imperial-fluid-ounces to teaspoons converters?
Most differences come from rounding the factor too early. This tool keeps full double precision through the calculation and only rounds at the final display step, and it also shows the unrounded value so you can see exactly where any difference appears.
What is a imperial fluid ounce?
The UK fluid ounce, about 4% smaller than its US counterpart.
What is a teaspoon?
The smallest standard kitchen measure, 4.93 millilitres.
Imperial Fluid Ounces to teaspoons reference table
| Imperial Fluid Ounces | Teaspoons |
|---|---|
| 0.5 fl oz | 2.8823 tsp |
| 1 fl oz | 5.7646 tsp |
| 2 fl oz | 11.5291 tsp |
| 3 fl oz | 17.2937 tsp |
| 5 fl oz | 28.8228 tsp |
| 10 fl oz | 57.6456 tsp |
| 15 fl oz | 86.4684 tsp |
| 20 fl oz | 115.2912 tsp |
| 25 fl oz | 144.114 tsp |
| 50 fl oz | 288.228 tsp |
| 75 fl oz | 432.342 tsp |
| 100 fl oz | 576.456 tsp |
| 250 fl oz | 1,441.14 tsp |
| 500 fl oz | 2,882.28 tsp |
| 1000 fl oz | 5,764.56 tsp |
Exact factor: 1 imperial fluid ounce = 5.764559642 teaspoons. Values rounded for display.