Financial calculator category
Everyday Money calculators
Everyday Money calculators: Handle percentages, discounts, pay conversions and inflation. The category holds 12 tools, including the Percentage Calculator, the Percentage Change Calculator and the Discount Calculator.
Percentage, Percentage Change and Discount handle most shopping and comparison math, and Tip and VAT cover added charges. Unit Price Comparison finds the better buy between two sizes. For work, Salary to Hourly, Pay Raise and Real Wage convert pay, and Inflation shows what money buys over time. Prorated Rent splits a partial month, and TV Size relates screen dimensions to viewing distance. Round late, not early.
Among the tools here are Percentage Calculator, Percentage Change Calculator, Discount Calculator, Tip Calculator, Salary to Hourly Calculator, Pay Raise Calculator, Inflation Calculator, Real Wage Calculator, and 4 more that follow the same pattern of formula, worked example, limits and sources.
Pick one below. Open it.
Percentage Calculator
Calculate what percentage one number represents of another.
Open calculator →02Percentage Change Calculator
Calculate absolute and percentage change between two values.
Open calculator →03Discount Calculator
Calculate sale price, tax and savings from a percentage discount.
Open calculator →04Tip Calculator
Calculate a tip, the final bill and an even per-person split for a group.
Open calculator →05Salary to Hourly Calculator
Convert annual salary into hourly and monthly gross pay.
Open calculator →06Pay Raise Calculator
Calculate new annual pay and monthly increase from a raise.
Open calculator →07Inflation Calculator
Project the future nominal cost and purchasing-power loss of today’s spending.
Open calculator →08Real Wage Calculator
Calculate a pay change after inflation.
Open calculator →09VAT Calculator
Estimate a VAT amount and tax-inclusive price using an entered local rate.
Open calculator →10Prorated Rent Calculator
Calculate rent for a partial month from the monthly rent, the days in the month and the days occupied.
Open calculator →11Unit Price Comparison Calculator
Compare the unit price of two package sizes and see how much the cheaper one saves.
Open calculator →12TV Size Calculator
Calculate a screen's width, height and area from its diagonal size and aspect ratio.
Open calculator →13Radius Map Calculator
Draw a radius around an address on a map and read the covered area, diameter and coordinates.
Open calculator →Go deeper
Everyday Money guides
Every tool, one table
Everyday Money calculators at a glance
Each row shows the headline figure that calculator returns at its own worked-example inputs.
| Calculator | What it answers | Headline output | Worked example |
|---|---|---|---|
| Percentage Calculator | Use the same units for part and whole. | Percentage | 12.5% |
| Percentage Change Calculator | Keep the original value as denominator. | Percentage change | 25.0% |
| Discount Calculator | Check whether local tax applies after discount. | Final price after tax | $96 |
| Tip Calculator | Choose the bill base matching local practice. | Total per person | $51 |
| Salary to Hourly Calculator | Account for unpaid time and benefits separately. | Equivalent hourly rate | $31 |
| Pay Raise Calculator | Start with gross change before estimating net pay. | New annual pay | $68,250 |
| Inflation Calculator | Use a range of inflation assumptions. | Estimated future cost | $67,196 |
| Real Wage Calculator | Separate nominal raises from purchasing-power gains. | Real wage change | 0.971% |
| VAT Calculator | Confirm local VAT treatment and rounding. | Price including VAT | $1,200 |
| Prorated Rent Calculator | Check a landlord's first or last month figure before you pay it. | Prorated rent | $720 |
| Unit Price Comparison Calculator | Find out whether the larger pack is really the better buy. | Unit price of item A | 0.299 |
| TV Size Calculator | Check whether a TV or monitor fits a stand or a wall space before you buy. | Screen width (in) | 56.7 |
Where people go wrong with everyday money numbers
Percent changes are asymmetric: a 50% drop needs a 100% gain to recover, and stacked discounts do not add. A raise of 3% during 4% inflation is a real pay cut, which the Real Wage calculator makes visible. Unit prices are only useful when the units match, so check the size labels. And VAT or sales tax rules differ by place, so check the local rate. Check the base. Percent of what?
Background reading
Everyday Money guides
- Fractions, decimals and percentages explainedMove between the three ways of writing a part of a whole, add and simplify fractions, and choose the right percent measure for a change or a difference.
Definitions
Everyday Money terms
- Inflation : glossary term
- The rate at which prices rise and purchasing power falls. It compounds, which is why long-horizon plans built on nominal figures overstate what will be affordable.
Keep exploring
Related calculator categories
Next to the everyday money tools, these categories answer the questions that usually come up alongside them.
Common everyday money questions
How do I calculate a percentage increase or decrease?
Divide the change by the original value and multiply by 100. The most common error is dividing by the new value instead of the original, which produces a different and smaller figure, and it is why a 50% fall requires a 100% rise to recover.
How much should I tip?
Customary rates vary by country, service type and local convention, and in some countries tipping is not expected at all. Where it is expected, the calculation is straightforward. The judgement is which rate applies, which is a social question , not an arithmetic one.
How do I convert an annual salary to an hourly rate?
Divide by the number of hours actually worked in a year. For employees, using a standard full-time figure is a reasonable approximation. For freelance work it is not, because unpaid time, self-employment obligations and benefits an employer would otherwise cover all have to be added first.
Why is a 20% discount followed by another 20% not 40% off?
Because the second discount applies to the already-reduced price instead of the original. Two successive 20% reductions leave 64% of the original price, a 36% total discount. Sequential percentages multiply. They do not add.
How does inflation affect what my money buys?
It reduces purchasing power at a compounding rate. So a fixed amount buys steadily less over time. Over long horizons the effect is large, which is why planning that mixes today's costs with future nominal returns systematically overstates what will actually be affordable.
What is the rule of 72?
Dividing 72 by a percentage rate approximates the years for a balance to double. It is accurate enough for mental arithmetic in the middle of the range and drifts at the extremes. It is a sanity check , not a calculation.
How do I split a bill fairly when orders differ?
Apportion each person's share of the pre-tax subtotal, then allocate tax and any tip proportionally to those shares. Splitting the total evenly is simpler and systematically overcharges whoever ordered least.
Is a percentage point the same as a percent?
No, and the distinction matters. Moving from 4% to 5% is a rise of one percentage point but a 25% increase in the rate itself. Reports that blur the two can overstate or understate a change dramatically.
People also ask
Everyday Money calculator questions
How do I calculate a percentage discount?
Multiply the price by the discount percent to get the saving, then subtract it, so 20% off $80 is $16 off, or $64.
Why does a 50% loss need a 100% gain to recover?
Because the gain applies to the smaller balance, so losing half and then doubling is needed to return to the start.
How do I convert salary to hourly pay?
Divide the annual salary by the hours worked in a year, commonly 2,080 for a 40-hour week.