# Nursing Calculations

Here is a link to maths resources on our Learning Lab website to help you with your nursing calculations. They cover decimals, fractions, numbers and percentages.

Arithmetic for nursing calculations

## Finding the volume required: defining the formula

This video clearly explains the difference between the key concepts of Strength and Volume and how they are used in drug calculations.

Volume required:worksheet (pdf)

Tablets required:worksheet (pdf)

Nursing calculations formula sheet (pdf)

Finding the volume required: understanding the formula

This video explains how to use the formula to determine the volume required in drug calculations.

Volume required:worksheet (pdf)

Tablets required:worksheet (pdf)

Finding the volume required: calculating from the labels

This video explains how to make mental calculations of the volume required using the labels.

Volume required:worksheet (pdf)

Tablets required:worksheet (pdf)

Finding the volume required: need over have

This video explains the concept behind the Volume Required formula. This video provides an example of finding VR using a sports drink mixture.

Volume required:worksheet (pdf)

Tablets required:worksheet (pdf)

Using proportions with liquid solutions

This video describes the concentration of a liquid using the example of a sports drink solution. It uses equivalent fractions to find equivalent expressions of the concentration. It demonstrates how to find the drug strength (in milligrams) contained in a given volume of liquid.

Concentration, flow rate, hourly dosages:worksheet (pdf)

Volume received, running time, flow rate:worksheet (pdf)

Converting between large and small units

This video demonstrates conversions between large and small units and vice versa and how this affects the placement of the decimal point.

Medication dosage by bodyweight

This video explains how body mass determines dosage rates in drug calculations.

The flowrate formula

This video explains how to calculate the flowrate for intravenous infusions.

Managing fractions and decimals in the flowrate formula

This video follows on from the previous video by explaining how to manage fractions and decimals when calculating the flowrate.

Dropfactor: converting between millilitres and drops

This movie explains the formula for converting between millilitres and drops and vice versa.

Converting flowrates between mL/hr and dpm

This movie explains the difference between the two units and flowrate conversion.

Solving problems using dimensional analysis

This movie explains the concepts of dimensional analysis and how it can be used to solve problems in drug calculations.