Convert pennyweight to last

Learn how to convert 1 pennyweight to last step by step.

Calculation Breakdown

Set up the equation

1.0 (p e n n y w e i g h t) = x (l a s t)

Define the base values of the selected units in relation to the SI unit

(k i l o g r a m)

Left side: 1.0 (p e n n y w e i g h t) = 1.55517384 \times 10^{- 3} (k i l o g r a m) = 1.55517384 \times 10^{- 3} (k g)

Right side: 1.0 (l a s t) = 1981.29147216 (k i l o g r a m) = 1981.29147216 (k g)

Insert known values into the conversion equation to determine

x

1.0 (p e n n y w e i g h t) = x (l a s t)

Insert known values =>

1.0 \times 1.55517384 \times 10^{- 3} \times (k i l o g r a m) = x \times 1981.29147216 \times (k i l o g r a m)

Or

1.0 \cdot 1.55517384 \times 10^{- 3} \cdot (k g) = x \cdot 1981.29147216 \cdot (k g)

Cancel SI units

1.0 \times 1.55517384 \times 10^{- 3} \cdot (k g) = x \times 1981.29147216 \times (k g)

Conversion Equation

1.55517384 \times 10^{- 3} = x \times 1981.29147216

Switch sides

x \times 1981.29147216 = 1.55517384 \times 10^{- 3}

Isolate

x

Multiply both sides by

(\frac{1.0}{1981.29147216})

x \times 1981.29147216 \times \frac{1.0}{1981.29147216} = 1.55517384 \times 10^{- 3} \times \frac{1.0}{1981.29147216}

Cancel

x \times 1981.29147216 \times \frac{1.0}{1981.29147216} = 1.55517384 \times 10^{- 3} \times \frac{1.0}{1981.29147216}

Simplify

x = \frac{1.55517384 \times 10^{- 3}}{1981.29147216}

Solve

x

x \approx 0.0000007849 \approx 7.8493 \times 10^{- 7}

Conversion Equation

1.0 (p e n n y w e i g h t) \approx 7.8493 \times 10^{- 7} (l a s t)

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