01
Compare the real checkout cost
A sticker price can be misleading. FairSpend can include package size, discounts, coupons, tax and fees before judging the deal.
◈ Smart everyday spending tools
Spend smarter.
Spend smarter.
Split fairly.
Know which deal is actually cheaper after size, discount, tax and shipping. Then split dinners, trips and shared expenses without the awkward math.
What's actually cheaper?
Normalize the package size, then include discounts, coupons, tax and shipping so the comparison reflects what you really pay.
Product A
FIRST OPTIONAEnter the shelf price and package size
Product B
SECOND OPTIONBEnter the competing deal
True price comparison
RESULT—
Enter two compatible package sizes.
FairSpend will show which option is cheaper per comparable unit.
Discount stack
QUICK TOOLFINAL CHECKOUT PRICE
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Target unit price
BUDGET CHECKPRICE PER UNIT
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Who owes whom?
Add the people and what each person paid. FairSpend works out the fair share and reduces the group to a short settlement list.
People
Everyone receives an equal share by default. Great for trips, roommates and group purchases.
Expenses
Settlement
$0.00 total
Add expenses, then calculate the group settlement.
Restaurant bill
TIP + SPLITEACH PERSON PAYS
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Roommate split
WEIGHTEDWEIGHTED SHARES
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02
Normalize unlike package sizes
Compare ounces with pounds, grams with kilograms, milliliters with liters, or different item counts on the same basis.
03
Settle groups with fewer payments
Instead of everyone paying everyone, the settlement engine matches debtors and creditors to produce a compact payment plan.
LEARN THE MATH
Spending guides for real decisions.
Worked examples explain the numbers behind each calculator, including what they leave out.
PRICE COMPARISONWhich package is actually cheaper?Compare the cost per useful unit and check the final checkout total.DISCOUNTSWhy two discounts don't add upSee the order of discounts, coupons and sales tax in a worked example.GROUP SPENDINGSettle a group fairlyTrack who paid and who owes before sending any money.TRANSPARENCYHow our calculators workRead formulas, assumptions, rounding rules and editorial standards.
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Make the rest of life simpler, too.
FairSpend handles what things cost and who owes what. These companion sites help with international comparisons and moving to the United States.
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Questions people actually ask
Can FairSpend compare ounces with pounds or grams with kilograms?
Yes. Weight units are normalized to grams and volume units are normalized to milliliters before comparing unit prices. Item counts can be compared with other item counts.
Why can't I compare a 12-pack with 2 liters?
Those describe different kinds of quantity. FairSpend will not pretend that a count and a liquid volume are directly comparable.
How does the group settlement work?
It totals what each person paid, calculates an equal share, then matches people who owe money with people who should receive money. The result is a compact settlement plan.
Does FairSpend move or upload my expense data?
This version performs the calculations in your browser. The calculator itself does not require an account or a server-side expense database.
FairSpend provides calculation tools for general informational use. Retailer pricing, tax treatment, discounts, refunds and payment rules can differ. Verify the final checkout total or group agreement before making a financial decision.