Money
Tip Calculator
Calculate a tip, total bill, and per-person share while seeing the math behind the result.
Enter the bill, tip rate, tax, and group size to see what each person owes and how the total is built.
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Practical help for the questions that slow you down.
Find a focused calculator, understand the assumptions behind it, and leave with a clearer next step.
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What are you trying to figure out?
The main hubs group tools with explanations, examples, and practical boundaries so you can choose the right starting point without guessing which calculator to open.
Money
Compare prices, understand borrowing costs, plan debt payoff, and make everyday money decisions.
You will find: Tip, discount, interest, loan payment, and debt payoff tools.
Explore the Money hubMoving
Build a moving budget, compare quotes, estimate supplies, and plan the costs that come after arrival.
You will find: Moving costs, quote comparisons, packing supplies, and fuel.
Explore the Moving hubHome
Estimate materials, understand household costs, and plan projects before you buy or hire.
You will find: Paint, concrete, gravel, electricity, recipes, and maintenance.
Explore the Home hubMeasurement
Convert units, compare quantities, understand dimensions, and make practical measurements easier to use.
You will find: Unit conversion, fractions, dimensions, area, volume, and fasteners.
Explore the Measurement hubPractical hubs
More than a number
Each tool is meant to teach you something useful.
See the method
Formulas and worked examples show how an answer was produced.
Know the limits
Assumptions and boundaries help you recognize when an estimate is only a starting point.
Take the next step
Guides, checklists, and related tools help turn a result into a practical decision.
Quick starts
Popular questions to start with
Money
Debt Payoff Calculator
Estimate a payoff date, total interest, and how much time an extra monthly payment could save.
Compare your current payment with an accelerated plan and see how additional money changes the payoff timeline.
Open calculatorMoving
Moving Cost Estimator
Build an itemized moving budget with transportation, travel, setup costs, and a contingency cushion.
Combine known quotes with your own estimates for fuel, lodging, packing, storage, cleaning, and the costs that appear late in a move.
Open estimatorHome
Paint Coverage Calculator
Estimate paint for a room or wall with coats, openings, coverage, and waste included.
Account for doors, windows, multiple coats, and a practical waste allowance before buying paint.
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SAE and Metric Unit Converter
Convert common length, mass, volume, and temperature measurements between U.S. customary and metric units.
Choose a measurement type and units to see the conversion, the formula used, and a reminder about what the units describe.
Open converterHome
Electricity Cost Calculator
Estimate appliance energy use and cost by day, month, and year from watts, usage time, and your rate.
Compare appliances using your own electricity rate without pretending to model every utility’s taxes, fees, or tier rules.
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