Salary Calculator

Why salary clarity matters in the US, UK and Canada

In the US, most employees see a gross figure on an offer letter, but their actual take-home is shaped by federal income tax, possibly state and local tax, and payroll taxes like Social Security and Medicare under FICA.

It’s common to be paid weekly, bi-weekly, semi-monthly or monthly, and two jobs with the same annual salary can feel very different depending on how often you’re paid.

In the UK, income tax is collected automatically through PAYE, and National Insurance contributions sit alongside it, reducing your net pay.

Many roles pay monthly, and while your payslip shows the deductions, it’s not always obvious how they translate into an hourly or daily rate or what happens if you add overtime.

In Canada, employers must withhold federal and provincial income tax, plus Canada Pension Plan (CPP) and Employment Insurance (EI). Pay frequency again varies—weekly, bi-weekly, semi-monthly or monthly—and overtime rules differ by province, often with time-and-a-half rates after a weekly threshold. 

Across all three countries, the pattern is the same: pay is shaped by a mix of rates, frequencies and deductions. Your Salary Calculator helps by putting these moving parts into a single, transparent view that you can adjust to match your own situation.

How this Salary Calculator is structured

The calculator on top of this article has four main modes, plus a flexible currency selector.

At the top, you pick your currency. The tool formats your results using a symbol and placement appropriate for each currency (for example, $60,000 in USD or £35,000 in GBP). That doesn’t change the math, but it keeps everything readable and familiar if you’re switching between US, UK, Canadian or other countries.

The Convert tab is where you start if you simply want to know: “If I earn this much per hour, what is that per year?” or “This offer says $75,000—what does that mean per hour?”

You choose the type of pay you have (hourly, daily, weekly, monthly or annual), enter the amount, and set your typical hours per week, weeks per year and days per week. The calculator then fills in all the other timeframes: hourly, daily, weekly, bi-weekly, monthly and annual.

The Gross→Net tab takes a gross amount per pay period and lets you estimate your deductions as percentages: tax, social/benefits and other deductions. The tool sums these, shows the total percentage coming off, and then calculates your net per period and net per year.

The Net→Gross tab flips that around. You enter the net amount you want to take home per pay period, and your estimated deduction percentages, and the calculator tells you the gross pay required to end up with that take-home. It also provides the gross annual equivalent.

Finally, the Overtime tab helps you understand how extra hours change your pay. You enter your base hourly rate, regular hours, overtime hours and the overtime multiplier (for example, 1.5x for “time-and-a-half”). The calculator gives you your regular pay, overtime pay, total weekly pay and your effective hourly rate once overtime is included.

In every tab, Copy buttons let you grab the results instantly—useful if you are comparing offers, filling a spreadsheet, or emailing your future employer or recruiter.

Converting between hourly, monthly and annual pay

In practice, people move between pay formats all the time. You might see a job advertised on an hourly basis in Canada, then compare it with a UK role which quotes an annual salary in pounds, and a US offer that’s bi-weekly pay. Being able to compare them quickly and fairly is essential.

The Convert mode is built around the reality that pay frequencies differ but the underlying work pattern is usually some combination of hours per week, weeks per year and days per week.

In North America, a common pattern is 40 hours per week and roughly 52 paid weeks per year, though vacation, sick pay and public holidays can affect this.

In the UK, contracted hours can be similar, but many roles quote annual salaries with expectations of some flexibility above the basic hours.

If you start with an annual figure—for example, a £38,000 role in London—you select “Annual salary”, enter 38,000 and keep or adjust the weeks and hours if needed. The calculator derives a weekly figure, divides by weeks per year, then down to daily and hourly rates.

If instead you know your hourly rate—for example, CAD $28/hour for a Canadian role—you can see what that translates to annually, on your own hours-per-week assumptions, rather than relying on rough rules of thumb.

This conversion is particularly helpful if you are comparing a 37.5-hour UK contract with a 40-hour US role or a 37-hour Canadian job. By adjusting the hours per week and weeks per year, you are comparing like with like: actual work time and actual pay, not just headline salaries.

Estimating take-home pay with Gross→Net

Once you have a sense of your gross pay, the next question is always: “What do I actually take home?”

In the US, employers typically withhold federal income tax, and possibly state and local income tax, as well as FICA payroll taxes that fund Social Security and Medicare.

In the UK, employers run PAYE to collect income tax and National Insurance from each paycheck.

In Canada, employers must deduct income tax, CPP or QPP, and EI from employment income before paying you. 

Real payroll systems use detailed tax brackets, allowances, thresholds and credits. They also treat things like pension contributions, health benefits or student loan payments in specific ways.

This calculator doesn’t attempt to duplicate that complexity. Instead, the Gross→Net tab asks you for your overall percentages: one for tax, one for social/benefits and one for any other deductions.

For many employees, total deductions fall somewhere between roughly 15% and 40% of gross pay, depending on country, income level, benefits and local taxes, but that band is wide on purpose.

You can start with a rough total based on your last payslip (for example, adding up all deductions and dividing by gross), then plug that into the calculator as your combined percentage. The calculator will show you:

• the total percentage deducted,
• the absolute deduction amount per period,
• your net per period, and
• your estimated net per year, based on how often you’re paid.

This is not a replacement for official tools like the IRS withholding estimator, HMRC’s check-your-income-tax calculator or CRA’s payroll deduction tables, which apply the actual law.

But it is extremely useful for quick planning: you can test how changes in tax rate, benefits or other deductions would affect your take-home before you commit.

Working backwards from Net→Gross for negotiation and planning

Sometimes you don’t start with an offer. You start with a life. Rent, transport, food, childcare, student loans and savings goals all add up to a number you need to see in your bank account every month.

The Net→Gross mode is designed for that situation. You enter the net amount you would like to receive per pay period—perhaps your target monthly take-home in Toronto, or a bi-weekly net figure that makes London housing affordable. You then enter your best estimates for tax, social/benefits and other deductions, just as in the Gross→Net tab.

The calculator adds those percentages, computes how much of your gross you keep, and then solves for the gross pay required to produce your target net. It also shows the annual gross equivalent so you can compare your target with job adverts that quote yearly salaries.

This mode is especially helpful when you are comparing offers across the US, UK and Canada. You can model a UK salary with PAYE and NI-style deduction percentages, then compare it to a Canadian role with different deduction assumptions, using the same target net.

The numbers will not be perfect—only a full tax model can achieve that—but they will be coherent and comparable, which is often enough to decide whether an offer is in the right ballpark.

Understanding deductions in simple terms

Because the calculator uses percentages, it helps to know what you are roughly lumping together when you enter those numbers.

In the United States, federal income tax is withheld based on your income, filing status and W-4 elections. Many states and some cities have their own income taxes.

On top of that, employers withhold FICA contributions: currently Social Security and Medicare are taken as fixed percentages of your wages, up to certain limits, to fund those programs.

Employer-funded benefits like health insurance or retirement contributions may also appear as deductions or reductions in taxable income.

In the United Kingdom, PAYE collects income tax from employment income according to bands and thresholds, and National Insurance contributions are deducted based on earnings and category.

Pension contributions under auto-enrolment and certain benefits may also reduce your net pay.

In Canada, employers deduct federal and provincial or territorial income tax, CPP or QPP contributions, and EI premiums, following CRA guidance and deduction tables.

Additional items like workplace pensions, union dues or group benefits often appear as percentage-type reductions as well.

The calculator doesn’t ask you to separate each of these precisely. Instead, it lets you group them into a tax percentage, a social/benefits percentage and an “other” percentage. You can tune those over time as you get better information from real payslips or official estimators.

Overtime, effective hourly pay and real-world rules

Overtime is another area where simple numbers hide a lot of law and practice.

In the US, most covered, non-exempt workers are entitled to at least “time and a half” (1.5 times their regular rate) for hours worked over 40 in a workweek under the Fair Labor Standards Act.

Some states add their own rules or thresholds, and certain workers are exempt based on job duties and salary levels.

In Canada, overtime standards are mostly set at the provincial level. In many provinces, including Ontario and Alberta, overtime is usually paid at 1.5 times the regular rate after 44 hours in a week, though some jurisdictions also apply daily thresholds or different rules.

Federally regulated workplaces also generally require at least 1.5 times the regular wage or equivalent time off with pay for overtime hours. 

In the UK, there is no statutory overtime rate. Employers do not have to pay extra for overtime as long as average pay, once all hours are counted, does not fall below the National Minimum or National Living Wage.

Overtime terms are usually set in the employment contract, and many employers still choose to pay enhanced rates for evenings, weekends or bank holidays.

The Overtime tab in this calculator does not enforce any specific country’s rules. Instead, it lets you input your base hourly rate, your regular and overtime hours, and whatever multiplier applies in your situation, whether that is 1.25x, 1.5x, 2x, or a contractual rate.

It then shows you how much of your weekly pay is regular versus overtime and what your effective hourly rate becomes when those extra hours are included.

This is especially helpful if you suspect overtime is masking a low base salary. You might discover that the “great money” you thought you were making relies on unsustainable overtime—once you switch to a standard-hours job, the effective hourly rate changes. Seeing that number clearly can guide your decisions about promotions, schedule changes or moving roles.

How to use the Salary Calculator as a decision tool

The most powerful use of this calculator is not just to see a single number, but to build small “what-if” scenarios around your life.

You might start in Convert mode to understand what a job’s annual salary really means on an hourly basis in your currency, then switch to Gross→Net and plug in a realistic total deduction percentage based on your country and current payslip.

After that, you might move to Net→Gross, set a higher target net, and see what gross salary you’d need to aim for in your next negotiation. Later, you could use the Overtime tab to decide whether extra shifts are worth it, or whether you would rather push for a higher base pay instead.

Because the calculator is interactive and updates as you type, you can experiment freely. You can try different hours per week, simulate a change from monthly to bi-weekly pay, or test how a change in deduction percentages might feel if tax thresholds shift in your country.

When you find a scenario you want to keep, the Copy buttons make it easy to paste those numbers into your notes, a budget, or an email thread with a recruiter.

A quick reminder about limitations

Tax and employment law in the US, UK and Canada are detailed and change over time. Official bodies like the IRS, HMRC and CRA publish up-to-date guidance, tables and calculators to apply those rules in full. 

This Salary Calculator is intentionally simpler. It assumes linear percentages for deductions, it doesn’t model tax bands or credits, and it doesn’t check eligibility rules or exemptions.

That is a feature, not a flaw: it lets you move quickly from “I have this number” to “What does this mean per hour, per year, after deductions and with overtime?” without needing to understand every page of tax law.

Use it as a planning and comparison tool. When you get close to a final decision—accepting an offer, relocating countries, or making a major financial commitment—pair the calculator’s clarity with an official tax estimator or professional advice.

Until then, let the Salary Calculator work alongside you as a clear, honest translator between the way jobs are advertised and the way money actually lands in your account.