Every calculator here shows the formula it used and where the numbers came from, with the date they were last checked. Nothing needs an account, and your figures never leave the browser — the arithmetic runs on your own machine.
A cheap rate can still be lost at the till. Saying yes to “pay in your own currency” adds 3–8% on top.
Source: European Central Bank reference rates via frankfurter.dev. Published once per working day; not a dealing or card-scheme rate. As of 2026-09-08.
A Big Mac costs £5.49 here — about $7.40. Against the dollar that puts sterling 19% overvalued.
An overvalued pound means your money goes further abroad than the headline rate implies. It also means the spread on a card payment or a transfer costs you more in real terms than it looks.
Source: The Economist, Big Mac index (July 2026), CC BY 4.0. Data
Five kilometres by taxi in London costs £17.00.
Weekday daytime rate, free-flowing traffic, distance only. Waiting time, tolls and airport flat fares are excluded.
Base ₩4,800 (1.6 km)
then ₩100 per 131 m or 30 s
Late night 20–40%, outside city 20% (60% cap)
₩11,840 at the 60% cap
Initial charge $3.00
70¢ per 1/5 mile or 60 s stopped
Night $1, rush $2.50, congestion $2.50, MTA 50¢, improvement $1
Surcharges alone reach $6.75 on a $14.20 meter
£4.40 for the first 155.8 m
then 20p per 77.9 m or 16.8 s
Tariff 2 and 3 — Tariff 3 runs 22:00–05:00
Tariff 3 ticks every 60.9 m, not 77.9 m
Base €4.30
€2.80/km to 3 km, €2.60 to 7 km, €2.10 beyond
Waiting €39/hour, BER airport €1.50
Ten minutes stuck adds €6.50
What the meter shows is not what you pay. Nobody tells you the surcharges before you get in.
Fares — each city’s official tariff — Seoul 서울특별시 택시요금 고시 · New York NYC Taxi & Limousine Commission · London Transport for London, taxi tariffs · Berlin Berlin.de, Taxi fares. Taxi fares are set by cities, not countries. Only the four cities whose official tariff we could check are listed.
Income Tax, National Insurance and student loan in one place.
Income Tax · NI · Student loan Savings · InterestWhat a deposit or a monthly saver is really worth after tax.
Simple vs compound · Regular saver · KR · US · UK · DE Dates · MilestonesDays until a date, days since one, and when each milestone falls.
Days until · Day 100 · Anniversaries · Leap years Cards · FXWhat saying yes to “pay in your own currency” actually costs.
Network + issuer + merchant markup · EU disclosure rule Loans · InterestMonthly payment and total interest, with all three repayment methods compared.
Grace period · Any currency · Total interest Mortgage · RatiosThe two ratios that decide most mortgage applications, with your country's limit alongside.
Loan-to-value · Debt-to-income · reference limits Transfers · FXWhat actually lands, once the margin buried in the rate is counted.
FX margin · correspondent fees · 6.36% global averageA search result can quote you a tax band. It cannot tell you what reaches your account, because that turns on your tax code, your student loan plan, and charges your bank does not itemise. These calculators answer the second question.
This site also publishes long-form finance writing in Korean.