US customary teaspoons to metric teaspoons (5 mL) converter
Convert US customary teaspoons (tsp (US)) to metric teaspoons (5 mL) (tsp (metric)).
Volume converter
Instant conversion
Edit either value. Decimals and scientific notation supported.
1
tsp (US)
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LitreL
MillilitremL
Cubic metrem³
Cubic centimetrecm³
Cubic footft³
Cubic inchin³
US liquid gallongal (US)
Imperial gallongal (UK)
US fluid ouncefl oz (US)
Imperial fluid ouncefl oz (UK)
US customary cupcup (US)
Metric cupcup (metric)
US liquid pintpt (US)
US liquid quartqt (US)
Imperial pintpt (UK)
Imperial quartqt (UK)
US customary teaspoontsp (US)
US customary tablespoontbsp (US)
Metric teaspoon (5 mL)tsp (metric)
Metric tablespoon (15 mL)tbsp (metric)
Cubic yardyd³
Imperial gillgi (UK)
Imperial peckpk (UK)
Imperial bushelbu (UK)
Imperial fluid drachmfl dr (UK)
Imperial minimminim (UK)
No units found. Try a name or symbol.
0.9857843187
tsp (metric)
esc
LitreL
MillilitremL
Cubic metrem³
Cubic centimetrecm³
Cubic footft³
Cubic inchin³
US liquid gallongal (US)
Imperial gallongal (UK)
US fluid ouncefl oz (US)
Imperial fluid ouncefl oz (UK)
US customary cupcup (US)
Metric cupcup (metric)
US liquid pintpt (US)
US liquid quartqt (US)
Imperial pintpt (UK)
Imperial quartqt (UK)
US customary teaspoontsp (US)
US customary tablespoontbsp (US)
Metric teaspoon (5 mL)tsp (metric)
Metric tablespoon (15 mL)tbsp (metric)
Cubic yardyd³
Imperial gillgi (UK)
Imperial peckpk (UK)
Imperial bushelbu (UK)
Imperial fluid drachmfl dr (UK)
Imperial minimminim (UK)
No units found. Try a name or symbol.
CONVERSION
1 tsp (US) ≈ 0.9857843187 tsp (metric)
6 significant figures
10 significant figures
15 significant figures
Precision changes displayed rounding, not calculation accuracy.
FORMULAtsp (metric) = tsp (US) × 0.98578431875
FORMULA & EXAMPLES
How to convert US customary teaspoons to metric teaspoons (5 mL)
tsp (metric) = tsp (US) × 0.98578431875
Multiply the tsp (US) reading by 0.98578431875.
Worked examples
1 tsp (US) ≈ 0.9857843187 tsp (metric)
1 × 0.98578431875 ≈ 0.9857843187
3 tsp (US) ≈ 2.957352956 tsp (metric)
3 × 0.98578431875 ≈ 2.957352956
Frequently asked questions
Which recipe measure should I select?
A metric cup is 250 mL, while a US customary cup is 236.5882365 mL. Metric teaspoons and tablespoons here are 5 mL and 15 mL; US customary spoons differ. Match the named definition in the recipe.
US customary teaspoons to metric teaspoons (5 mL) table
Fixed reference · US customary teaspoon to Metric teaspoon (5 mL)
Reference values use this page’s named pair and default context. Calculator precision and font settings do not change this table.
US customary teaspoon (tsp (US))
Metric teaspoon (5 mL) (tsp (metric))
0
0
0.1
0.09857843187
0.5
0.4928921594
1
0.9857843187
2
1.971568637
5
4.928921594
10
9.857843187
25
24.64460797
50
49.28921594
100
98.57843187
1000
985.7843187
Table results use 10 significant figures; decimal formula coefficients use up to 15. Calculations use the unit definitions before rounding. Extra digits do not improve measurement accuracy.