FORMULA
E/t
Choose the relationship
ROUNDING
2DP
Result rounding only
ENERGY (E)
J
joules (J)
TIME (t)
s
seconds (s)
REMEMBER
W
Watts (W) = joules per second
UNITS
TIP
Keep units consistent
WORKING
—
—
—
—
—
POWER
READY
—
PAGE 1/2
FORMULA
E/t
Choose the relationship
ROUNDING
2DP
Result rounding only
ENERGY (E)
J
joules (J)
TIME (t)
s
seconds (s)
REMEMBER
W
Watts (W) = J/s
UNITS
TIP
Keep units consistent
WORKING
—
—
—
—
—
POWER
READY
—
PAGE 1/2
HOW TO USE
1) Choose a FORMULA
2) Enter the two values
3) Press SOLVE
4) Answer is in W
P = E / t
P = E ÷ t
E in joules (J)
t in seconds (s)
P = I × V
P = I × V
I in amps (A)
V in volts (V)
WORKED EXAMPLES
E=120 J, t=10 s
P = 120 ÷ 10 = 12 W
I=2 A, V=6 V
P = 2×6 = 12 W
PAGE 2/2