Cost Per 100G Calculator
Quickly calculate the cost per 100 grams of a product to easily compare prices between different sizes or brands.
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Understanding Unit Pricing (Cost Per 100g)
Comparing the cost per unit of weight (like per 100g) is a smart shopping strategy. It helps you determine which size or brand offers the best value, regardless of the package size. This calculator standardizes the price to a 100g unit for easy comparison.
Formula
The calculation is straightforward:
Cost Per 100g = (Total Cost / Total Quantity in Grams) * 100
Cost Per 100g Examples
See how to calculate the cost per 100g for various products:
Example 1: Bag of Coffee Beans
Scenario: A 500g bag of coffee beans costs $12.50.
1. Known Values: Total Cost = $12.50, Total Quantity = 500g.
2. Formula: Cost Per 100g = (Total Cost / Total Quantity) * 100
3. Calculation: Cost Per 100g = ($12.50 / 500g) * 100 = $0.025 * 100 = $2.50
4. Result: The cost per 100g is $2.50.
Conclusion: For comparison, every 100g of this coffee costs $2.50.
Example 2: Small Chocolate Bar
Scenario: A 75g chocolate bar costs $2.00.
1. Known Values: Total Cost = $2.00, Total Quantity = 75g.
2. Formula: Cost Per 100g = (Total Cost / Total Quantity) * 100
3. Calculation: Cost Per 100g = ($2.00 / 75g) * 100 ≈ $0.02667 * 100 ≈ $2.67
4. Result: The cost per 100g is approximately $2.67.
Conclusion: Comparing this to a larger bar's cost per 100g helps see the better deal.
Example 3: Bag of Rice
Scenario: A 2.5 kg bag of rice costs $8.99.
1. Known Values: Total Cost = $8.99, Total Quantity = 2.5 kg = 2500g.
2. Formula: Cost Per 100g = (Total Cost / Total Quantity) * 100
3. Calculation: Cost Per 100g = ($8.99 / 2500g) * 100 = $0.003596 * 100 ≈ $0.36
4. Result: The cost per 100g is approximately $0.36.
Conclusion: Rice is typically inexpensive per 100g.
Example 4: Small Jar of Jam
Scenario: A 340g jar of jam costs $3.40.
1. Known Values: Total Cost = $3.40, Total Quantity = 340g.
2. Formula: Cost Per 100g = (Total Cost / Total Quantity) * 100
3. Calculation: Cost Per 100g = ($3.40 / 340g) * 100 = $0.01 * 100 = $1.00
4. Result: The cost per 100g is $1.00.
Conclusion: A convenient unit price calculation.
Example 5: Pack of Ground Meat
Scenario: A 450g pack of ground meat costs $4.05.
1. Known Values: Total Cost = $4.05, Total Quantity = 450g.
2. Formula: Cost Per 100g = (Total Cost / Total Quantity) * 100
3. Calculation: Cost Per 100g = ($4.05 / 450g) * 100 = $0.009 * 100 = $0.90
4. Result: The cost per 100g is $0.90.
Conclusion: Useful for comparing different meat quantities.
Example 6: Bulk Candy
Scenario: You buy 800g of bulk candy for $7.20.
1. Known Values: Total Cost = $7.20, Total Quantity = 800g.
2. Formula: Cost Per 100g = (Total Cost / Total Quantity) * 100
3. Calculation: Cost Per 100g = ($7.20 / 800g) * 100 = $0.009 * 100 = $0.90
4. Result: The cost per 100g is $0.90.
Conclusion: Easy way to price bulk items by a standard unit.
Example 7: Spice Jar
Scenario: A small 30g jar of a spice costs $3.60.
1. Known Values: Total Cost = $3.60, Total Quantity = 30g.
2. Formula: Cost Per 100g = (Total Cost / Total Quantity) * 100
3. Calculation: Cost Per 100g = ($3.60 / 30g) * 100 = $0.12 * 100 = $12.00
4. Result: The cost per 100g is $12.00.
Conclusion: Spices often have a high cost per unit due to processing, packaging, and small quantities.
Example 8: Pack of Pasta
Scenario: A 400g pack of pasta costs $1.80.
1. Known Values: Total Cost = $1.80, Total Quantity = 400g.
2. Formula: Cost Per 100g = (Total Cost / Total Quantity) * 100
3. Calculation: Cost Per 100g = ($1.80 / 400g) * 100 = $0.0045 * 100 = $0.45
4. Result: The cost per 100g is $0.45.
Conclusion: Compare this unit price across different pasta shapes or brands.
Example 9: Protein Powder Tub
Scenario: A 907g tub of protein powder costs $35.00.
1. Known Values: Total Cost = $35.00, Total Quantity = 907g.
2. Formula: Cost Per 100g = (Total Cost / Total Quantity) * 100
3. Calculation: Cost Per 100g = ($35.00 / 907g) * 100 ≈ $0.03859 * 100 ≈ $3.86
4. Result: The cost per 100g is approximately $3.86.
Conclusion: Allows comparison with other sizes or brands of supplements.
Example 10: Loaf of Bread
Scenario: A 550g loaf of bread costs $3.30.
1. Known Values: Total Cost = $3.30, Total Quantity = 550g.
2. Formula: Cost Per 100g = (Total Cost / Total Quantity) * 100
3. Calculation: Cost Per 100g = ($3.30 / 550g) * 100 = $0.006 * 100 = $0.60
4. Result: The cost per 100g is $0.60.
Conclusion: Compare unit price for different types or sizes of bread.
Frequently Asked Questions about Cost Per 100G Calculation
1. What is "Cost Per 100g"?
Cost per 100g is a unit price measurement indicating how much it costs to purchase exactly 100 grams of a specific product. It's used to standardize pricing across different package sizes.
2. Why should I calculate Cost Per 100g?
Calculating cost per 100g helps you compare prices accurately. A larger package might seem cheaper upfront, but the smaller one could potentially have a lower cost per unit weight. This calculation reveals the true value.
3. How do I use this calculator?
Enter the total price you paid for a product in the "Total Cost" field and the total weight of the product in grams in the "Total Quantity (Grams)" field. Click "Calculate" to get the cost for every 100 grams.
4. What if my product quantity is in kilograms (kg) or pounds (lb)?
You need to convert the quantity to grams before entering it. 1 kg = 1000 grams. 1 lb ≈ 453.592 grams. Many online converters can help with this.
5. Can I use this for liquids or volumes?
This specific calculator is designed for weight (grams). For liquids, you would typically calculate cost per unit of volume (e.g., per liter or per fluid ounce). If you know the density, you could potentially convert volume to weight, but it's less common for simple price comparisons.
6. What kind of products is this useful for?
It's most useful for groceries and dry goods sold by weight, such as grains, nuts, coffee, tea, meat, cheese, spices, candy, etc.
7. What are the required inputs?
You need two inputs: the total cost of the item and its total quantity in grams.
8. What is the output?
The output is the calculated cost for exactly 100 grams of the product.
9. What happens if I enter zero quantity?
The calculator will show an error because you cannot calculate a price per unit if the quantity is zero.
10. Can I use this to compare prices between different stores?
Yes, as long as you input the cost and quantity for the *exact same product* from different stores, or calculate the unit price for different but comparable products.
