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Practical tools. Transparent assumptions.
Clear numbers.
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Price your next sale. Plan a home purchase. Make sense of a business cost. Free calculators that show how the answer was reached.
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Make the whole payment visible
$3,128.27 / month$400,000 loan · 6.5% fixed · 30 years
Includes $600/month taxes and insurance
Excludes PMI, HOA and other costs
Start with your decision
A useful place for every number.
Resale & inventoryKnow what to pay, what to charge, and what you keep.Home & mortgageCompare payments, upfront costs and the long view.Debt & payoffSee what a different payment changes over time.Saving & investingConnect today's contribution with tomorrow's goal.Business & pricingSeparate revenue, margin and the cost of doing business.Trucking & freightCount paid miles, empty miles and real operating costs.
Go beyond a single answer
Two ways to see the bigger picture.
New workflowCSV Resale Profit AnalyserAnalyse inventory CSV rows locally. Map costs and fees, calculate profit by item, flag low margins, and export estimates without uploading your file.Open tool →New workflowMortgage Offer Comparison CalculatorCompare two fixed-rate mortgage offers over your holding period, including fees, lender credits, interest, principal repaid and remaining balance.Open tool →
Blog & guides
The story behind the numbers.
Real questions, hypothetical examples, and a calculator to make each one your own.
HousingWhat a $5,000 mortgage lump sum changes a year into repaymentFollow a dated $300,000 mortgage example with one $5,000 principal payment, a capped final payment and a downloadable monthly schedule.Read the worked example →BusinessHow to calculate blended margin across two product linesCombine product-line revenue and cost correctly, see why averaging margin percentages can mislead, and reconcile the result to markup.Read the worked example →BusinessA lower business-loan rate can hide a larger borrowing costCompare two hypothetical $10,000 business loans: 10% with $1,000 deducted fees versus 12% without fees. Follow usable proceeds and repayments.Read the worked example →
Confidence comes from knowing the assumptions.
No account. No hidden inputs. No promises that an estimate is a guaranteed outcome. Review the sources, change the assumptions, and keep the decision yours.
How we check the math →