Unit price

Calculate a price per kilogram, liter or item and compare two offers.

Your inputs stay in your browser.

Method and assumptions

Method version 1.0.0 · Updated September 23, 2026

Calculate a unit price

Formula: Unit price = price / quantity in kg, L or items

The result is per kilogram for g/kg, per liter for mL/L, or per item. Example: 3 for 500 g → 6 per kg. Quantity must be strictly positive. No mass/volume conversion or additional fees.

price: Pack price
quantity: Pack quantity
unit: Quantity unit
precision: Money decimal places

Compare two offers

Formula: Compare price A / quantity A and price B / quantity B

Compare the same currency and quantity type. g and kg are compatible, as are mL and L; mass, volume and items cannot be mixed. Comparison uses exact prices before display rounding: two identical displayed prices can still have a cheaper offer.

priceA: Offer A price
quantityA: Quantity A
unitA: Unit A
priceB: Offer B price
quantityB: Quantity B
unitB: Unit B
precision: Money decimal places

All amounts use the same currency, without conversion. Choose 0, 2 or 3 decimal places for your needs. Rounded to nearest, ties up.

Calculate with code

These short examples use the same inputs and core calculation as this tool. Adapt validation and formatting to your application.

JavaScript

const price = 4.50, quantity = 1.5;
console.log(price / quantity); // 3 per unit

TypeScript

const price = 4.50, quantity = 1.5;
const unitPrice: number = price / quantity;
console.log(unitPrice); // 3

Python

price, quantity = 4.50, 1.5
print(price / quantity)  # 3.0 per unit

Java

double price = 4.50, quantity = 1.5;
System.out.println(price / quantity); // 3.0 per unit

decimal price = 4.50m, quantity = 1.5m;
Console.WriteLine(price / quantity); // 3.0 per unit