Converters
12
Guide
How to convert time
Enter a duration and choose the original and target time units. The converter handles exact units from milliseconds through weeks.
Time uses seconds as the base unit: result = amount x source seconds / target seconds.
Examples
Time conversion examples
Hours to minutes
1 h
equals
60 min
Days to hours
3 d
equals
72 h
Milliseconds to seconds
1500 ms
equals
1.5 s
Time
All conversions
Second to Millisecond
Conversion library
Supported categories
Temperature
Celsius, Fahrenheit, and Kelvin with proper offset formulas.
deg C
deg F
K
Volume
Liters, cubic meters, and common US kitchen measures.
L
mL
m3
tsp
tbsp
fl oz
+4
Distance
Metric, imperial, nautical, and everyday distance units.
m
km
cm
mm
in
ft
+3
Data Byte
Bits, bytes, SI storage units, and binary storage units.
B
bit
KB
MB
GB
TB
+4
Mass
Grams, kilograms, tons, pounds, ounces, and stones.
kg
g
mg
t
lb
oz
+1
Area
Surface units from square millimeters to square miles.
m2
km2
cm2
mm2
ha
ac
+3
Speed
Meters per second, kilometers per hour, miles per hour, knots, and feet per second.
m/s
km/h
mph
kn
ft/s
Time
Exact time units from milliseconds to weeks.
s
ms
min
h
d
wk
Frequency
Hertz, kilohertz, megahertz, gigahertz, and revolutions per minute.
Hz
kHz
MHz
GHz
THz
rpm
Pressure
Pascals, bar, atmosphere, PSI, and torr.
Pa
kPa
bar
atm
psi
Torr
Energy
Joules, calories, watt-hours, kilowatt-hours, and BTU.
J
kJ
cal
kcal
Wh
kWh
+1
Angle
Degrees, radians, gradians, arcminutes, arcseconds, turns, and angular mils.
rad
deg
grad
'
''
turn
+1
Popular conversions
Time links
Conversion table
1 Hour equals
| Unit | Value |
|---|---|
| Second s | 3600 |
| Millisecond ms | 3600000 |
| Minute min | 60 |
| Day d | 0.0416666666667 |
| Week wk | 0.00595238095238 |
Formula model
Base-unit conversion
Calendar months and years are intentionally omitted because their lengths vary.
base = amount * factor + offset
result = (base - targetOffset) / targetFactor
result = (base - targetOffset) / targetFactor
Scope
Fixed conversions first
Currency, crypto, and market-rate conversions need live exchange data, so they are kept separate from the fixed scientific units in this build.
Exact units
Lengths, masses, storage, time, and most derived units.
Offset units
Celsius, Fahrenheit, and Kelvin conversions.
FAQ
Time converter questions
Why are months not included?
Months vary from 28 to 31 days, so they are not fixed-duration units.
Are weeks exact here?
Yes. One week is treated as exactly seven days.