How many teaspoons are in a tablespoon?
Three, when both units use the same US or metric standard.
Small measures made simple
Convert cooking volumes while keeping US, UK imperial, and metric measures clearly separated.

Quick reference
Unit standards differ, so check whether the original recipe is US, UK imperial, or metric.
| Measure | Millilitres | Notes |
|---|---|---|
| 1 metric teaspoon | 5 ml | Common metric recipe measure |
| 1 metric tablespoon | 15 ml | 3 metric teaspoons |
| 1 US teaspoon | 4.929 ml | US customary measure |
| 1 US tablespoon | 14.787 ml | 3 US teaspoons |
| 1 US fluid ounce | 29.574 ml | Not the same as an ounce by weight |
| 1 UK fluid ounce | 28.413 ml | Imperial fluid ounce |
Fluid ounces measure volume; ordinary ounces measure mass. Likewise, a tablespoon of flour and a tablespoon of honey occupy similar volume but have different weights.
FAQ
Three, when both units use the same US or metric standard.
No. A fluid ounce measures volume, while an ounce without “fluid” usually measures mass.
Because their volumes are different and combining them silently creates inaccurate results.
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