Everyday Math

Unit Price Calculator

Everyday Math

Unit Price Calculator

Comparison basis first

Best value answerItem A winsA 0.54 / unit · B 0.58 / unit · 1.01 over 24 unit.

0.54Item A / unit0.58Item B / unit0.04Absolute gap7.8%Percent gap

Formula: package price divided by comparable quantity. Use the same unit basis for both options before trusting the winner.

CountPer unitQuality and expiry not judged

Item A priceShelf price, quoted price or package price for the first option.Item A quantity (unit)Total count, weight, volume, metres, square metres or other comparable quantity in item A.Item B priceShelf price, quoted price or package price for the second option.Item B quantity (unit)Use the same unit basis as item A: both grams, both litres, both pieces, both metres, and so on.

Unit basis

Live resultItem A winsA 0.54 / unit · B 0.58 / unit · 1.01 over 24 unit.

Formula used

Unit price = total price ÷ comparable quantity. Unit-price gap = higher unit price − lower unit price. Same-quantity saving = unit-price gap × the compared quantity.

This is the method behind the answer, so the result can be checked rather than simply trusted.

Live math canvas

Your numbers, formula and explanation together

Unit Price Calculator: Item A at 0.54 per unit. A: 0.54 per unit · B: 0.58 per unit · gap 0.04 per unit · about 1.01 over 24 units

Formula applied

The exact method behind this answer

CalculationTime keeps the method visible so the number can be checked instead of blindly trusted.

Unit price = total price ÷ comparable quantity. Unit-price gap = higher unit price − lower unit price. Same-quantity saving = unit-price gap × the compared quantity.

Apply the formulaUnit price = total price ÷ comparable quantity. Unit-price gap = higher unit price − lower unit price. Same-quantity saving = unit-price gap × the compared quantity.Item A at 0.54 per unitA: 0.54 per unit · B: 0.58 per unit · gap 0.04 per unit · about 1.01 over 24 units

Your live breakdown

Current inputs in the calculation

These values come from the controls above and update when the calculator changes.

Item A price: 12.99 currency
Item A quantity: 24 units
Item B price: 8.75 currency
Item B quantity: 15 same units

Resulting answer

Item A at 0.54 per unit

A: 0.54 per unit · B: 0.58 per unit · gap 0.04 per unit · about 1.01 over 24 units

Answer: Item A at 0.54 per unit
Live support: A: 0.54 per unit · B: 0.58 per unit · gap 0.04 per unit · about 1.01 over 24 units

Assumptions used

What this answer assumes

Arithmetic value comparison only. Use the same quantity unit for both items before trusting the result.

Both quantities must use the same basis before comparison, such as grams with grams, litres with litres, pieces with pieces, or metres with metres.
The calculator compares arithmetic unit price only; brand quality, delivery fees, expiry dates, returns, taxes, coupons, minimum orders and pack usability are separate decisions.
Quantities must be greater than zero; zero-quantity packages cannot produce a meaningful unit price.
Currency symbols are not assumed, so the same arithmetic works for shopping, supplier quotes, classroom worksheets and simple procurement checks.

Master’s Tip

How to use the result well

Master’s Tip: normalise the quantity before comparing. A 500 g pack and a 1.2 kg pack are not comparable until both are expressed in the same unit. Then print the unit basis beside the answer so the cheaper option is auditable.

Printable record

What belongs in the saved calculation

Save the inputs, result, formula, assumptions, page URL and date together so the calculation can be reviewed later.

Item A price: 12.99 currency
Item A quantity: 24 units
Item B price: 8.75 currency
Item B quantity: 15 same units

What-if check

Unit-price comparison

Both prices are divided by their quantities. The lower unit rate wins only when the quantity basis is the same for both items.

Option	Package	Unit price
Item A · cheaper	12.99 ÷ 24	0.54 per unit
Item B	8.75 ÷ 15	0.58 per unit

Visual proof

Shorter bar means lower unit price

Blue marks the cheaper unit rate. If the units are not already matched, convert them first and write the basis in the printed notes.

Visual grid

This number is one point on a larger pattern

Unit Price is not just a final answer. It is a step on a line: before and after, input and output, assumption and result.

Micro-timehours, minutes, shiftsHuman scaledays, weeks, projectsMacro-timemonths, years, calendars

InputFormulaResult

Item A at 0.54 per unit

CalculationTime keeps the path visible: the input, the method and the final number belong together.

Item A at 0.54 per unitA: 0.54 per unit · B: 0.58 per unit · gap 0.04 per unit · about 1.01 over 24 units

Inputs

Item A price: 12.99 currency
Item A quantity: 24 units
Item B price: 8.75 currency
Item B quantity: 15 same units

Method

Unit price = total price ÷ comparable quantity. Unit-price gap = higher unit price − lower unit price. Same-quantity saving = unit-price gap × the compared quantity.

Item A costs 12.99 for 24 units, so 12.99 ÷ 24 = 0.54125 per unit. Item B costs 8.75 for 15 units, so 8.75 ÷ 15 = 0.58333 per unit. Item A is cheaper by 0.04208 per unit.

Assumptions

Both quantities must use the same basis before comparison, such as grams with grams, litres with litres, pieces with pieces, or metres with metres.
The calculator compares arithmetic unit price only; brand quality, delivery fees, expiry dates, returns, taxes, coupons, minimum orders and pack usability are separate decisions.
Quantities must be greater than zero; zero-quantity packages cannot produce a meaningful unit price.
Currency symbols are not assumed, so the same arithmetic works for shopping, supplier quotes, classroom worksheets and simple procurement checks.

Notes

Use this space on the printed report for client, supplier, classroom, job-location, measurement, quote or approval notes.