US customary teaspoons to imperial fluid drachms converter
Convert US customary teaspoons (tsp (US)) to imperial fluid drachms (fl dr (UK)).
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.
1.387790308
fl dr (UK)
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) ≈ 1.387790308 fl dr (UK)
6 significant figures
10 significant figures
15 significant figures
Precision changes displayed rounding, not calculation accuracy.
FORMULAfl dr (UK) = tsp (US) × 1.38779030771498
FORMULA & EXAMPLES
How to convert US customary teaspoons to imperial fluid drachms
fl dr (UK) = tsp (US) × 1.38779030771498
Multiply the tsp (US) reading by 1.38779030771498.
Worked examples
1 tsp (US) ≈ 1.387790308 fl dr (UK)
1 × 1.38779030771498 ≈ 1.387790308
3 tsp (US) ≈ 4.163370923 fl dr (UK)
3 × 1.38779030771498 ≈ 4.163370923
Frequently asked questions
Why do UK and US capacity readings differ?
The Imperial gallon is 4.54609 L, while the US liquid gallon is 3.785411784 L. Each system has 8 pints and 4 quarts per gallon. An Imperial gallon contains 160 Imperial fluid ounces; a US gallon contains 128 US fluid ounces.
US customary teaspoons to imperial fluid drachms table
Fixed reference · US customary teaspoon to Imperial fluid drachm
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))
Imperial fluid drachm (fl dr (UK))
0
0
0.1
0.1387790308
0.5
0.6938951539
1
1.387790308
2
2.775580615
5
6.938951539
10
13.87790308
25
34.69475769
50
69.38951539
100
138.7790308
1000
1387.790308
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.