Calculate the price per unit
Enter the total price you pay and the quantity in the same unit shown on the pack or invoice. The calculator divides total price by quantity, making it easier to compare different pack sizes or supplier offers.
How unit price works
Unit price equals total price divided by quantity. For example, a 2 kg pack costing 360 has a unit price of 180 per kg. Compare like with like: convert grams to kilograms, millilitres to litres, or pieces to pieces before deciding which offer is lower.
Use unit price with supplier and product records
A lower unit price is not always the lower total cost. Check minimum order quantities, delivery charges, damage, tax treatment, and the quantity you can realistically sell. Record the verified purchase cost in your supplier and purchase workflow, then use the markup calculator to test a proposed selling price.
Compare pack sizes on the same unit basis
A fair comparison uses the same measurement. Convert both offers to kilograms, litres, metres or individual pieces before comparing the results. If one supplier quotes a case and another quotes a pack, first confirm how many sellable units each contains.
Unit price formula
Unit price = total price ÷ total quantity. The currency stays the same as the entered total, while the result is expressed per chosen unit. A price of 540 for 3 kilograms equals 180 per kilogram. A price of 150 for 750 grams equals 0.20 per gram, or 200 per kilogram after conversion.
Worked unit-price examples for retailers
Compare two package sizes
A 12-piece pack costing 480 has a unit price of 40 per piece. A 20-piece pack costing 740 has a unit price of 37 per piece. The larger pack is lower per piece, but it also requires 260 more cash and enough demand and storage for eight additional units.
Compare grams with kilograms
A 500-gram product costing 95 equals 190 per kilogram. A 1.5-kilogram pack costing 270 equals 180 per kilogram. Convert both quantities to kilograms—or both to grams—before deciding which unit price is lower.
Include a discount in the total price
When a verified discount applies to the whole pack, use the actual final pack price in the calculator. Keep delivery, tax treatment, payment fees and rebates separate unless the comparison specifically requires a documented landed-cost basis.
When the lowest unit price is not the best order
- The minimum order exceeds realistic sales or usage.
- The product may expire, become obsolete or be damaged in storage.
- Delivery, handling or payment charges change the total cost.
- One quote uses a different specification, quality or pack content.
- The larger order ties up cash needed elsewhere.
- A supplier’s delivery or return terms create additional risk.
Unit price answers an arithmetic question. It does not evaluate supplier reliability, product quality, available storage or likely demand.
Common unit-price calculation mistakes
Do not compare kilograms with grams without conversion, use the labelled pack quantity when fewer sellable units were actually received, or divide by cartons when the decision concerns pieces. A zero quantity has no valid unit price. Recheck decimal placement when converting millilitres to litres or grams to kilograms.
Use the result in a retail purchasing workflow
Compare the same verified item and unit, then record the approved choice in the retail purchase-order checklist. Review supplier terms through Purchase and Supplier Management, keep pack and piece identities consistent in Product Management, and use the markup calculator only after confirming the cost basis.
This free calculator runs in the browser and does not save the values to a SellingIt merchant account. It provides arithmetic, not purchasing, accounting, tax or pricing advice.