Weight Price Comparison
Compare two products by unit price. Default currency: USD.
Inputs
Product A — Price (USD)
Product A — Quantity
Unit
Product B — Price (USD)
Product B — Quantity
Unit
Compare per
Tip: use per 100 g, per 1 kg, per 1 lb, etc.
Results
Product A unit price
—
Product B unit price
—
Cheaper
—
Fill inputs to see the summary.
Step-by-step derivation
- Enter price and quantity for both products.
- Choose how you want to compare (e.g., per 100 g, per 1 kg, etc.).
- We convert each product’s quantity into the chosen compare unit and compute:
unit price = total price ÷ (quantity in chosen unit)
References
- General retail math: unit price = price ÷ quantity.
- Mass conversions: 1 kg = 1000 g; 1 lb = 453.59237 g; 1 oz = 28.349523125 g.
Volume Price Comparison
Compare two products by unit price per a chosen volume. Default currency: USD.
Inputs
Product A — Price (USD)
Product A — Volume
Unit
Product B — Price (USD)
Product B — Volume
Unit
Compare per
Tip: Try per 100 mL, 1 L, 1 US gal, etc.
Results
Product A unit price
—
Product B unit price
—
Cheaper
—
Fill inputs to see the summary.
Step-by-step derivation
- Enter price and volume for both products.
- Choose the comparison basis (e.g., per 100 mL or per 1 L).
- We convert each product’s volume into the chosen unit and compute:
unit price = total price ÷ (volume in chosen unit)
References
- Retail math: unit price = price ÷ quantity.
- Volume conversions (base = mL): 1 L = 1000 mL; 1 cm³ = 1 mL; 1 m³ = 1,000,000 mL; 1 US gal = 3785.411784 mL; 1 UK gal = 4546.09 mL; 1 cu in = 16.387064 mL; 1 cu ft = 28316.846592 mL.
Items Price Comparison
Compare two packs by unit price per chosen number of items. Default currency: USD.
Inputs
Product A — Price (USD)
Product A — Items (count)
Product B — Price (USD)
Product B — Items (count)
Compare per (items)
Tip: Use 1 for “per item”, or try 6, 10, etc.
Results
Product A unit price
—
Product B unit price
—
Cheaper
—
Fill inputs to see the summary.
Step-by-step derivation
- Enter price and item count for both products.
- Choose the comparison basis (e.g., per 1 item or per 10 items).
- We compute:
unit price = total price × (per items ÷ pack items)
References
- Unit price (per item) = total price ÷ number of items.
- Generalized “per N items”: unit price per N = total price × (N ÷ items).
Items × Weight Price Comparison
Compare two packs by price per chosen weight (e.g., per 100 g). Default currency: USD.
Inputs
Product A — Price (USD)
Items (count)
Weight per item
Unit
Product B — Price (USD)
Items (count)
Weight per item
Unit
Compare price per
Tip: Try per 100 g, 1 kg, 1 lb, etc.
Results
Product A unit price
—
Product B unit price
—
Cheaper
—
Fill inputs to see the summary.
Step-by-step derivation
- Enter price, item count, and weight per item for both products.
- Choose the comparison basis (e.g., per 100 g).
- We compute each pack’s total weight and then:
unit price = total price ÷ (total weight in chosen unit ÷ compare-per amount)
References
- Unit price per weight = price ÷ weight.
- Total weight (pack) = items × weight per item.
- Mass conversions: 1 kg = 1000 g; 1 lb = 453.59237 g; 1 oz = 28.349523125 g.
Items × Volume Price Comparison
Compare two packs by price per chosen volume (e.g., per 100 mL). Default currency: USD.
Inputs
Product A — Price (USD)
Items (count)
Volume per item
Unit
Product B — Price (USD)
Items (count)
Volume per item
Unit
Compare price per
Tip: Try per 100 mL, 1 L, 1 US gal, etc.
Results
Product A unit price
—
Product B unit price
—
Cheaper
—
Fill inputs to see the summary.
Step-by-step derivation
- Enter price, item count, and volume per item for both products.
- Choose the comparison basis (e.g., per 100 mL).
- We compute each pack’s total volume and then:
unit price = total price ÷ (total volume in chosen unit ÷ compare-per amount)
References
- Unit price per volume = price ÷ volume.
- Total volume (pack) = items × volume per item.
- Volume conversions (base = mL): 1 L = 1000 mL; 1 cm³ = 1 mL; 1 m³ = 1,000,000 mL; 1 US gal = 3785.411784 mL; 1 UK gal = 4546.09 mL; 1 cu in = 16.387064 mL; 1 cu ft = 28316.846592 mL.