Guides & data studies
Clear, no-nonsense explainers and original data studies from the team behind YouCalc’s calculators — so you understand the numbers before you run them.
Data studies
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Data study Finance & MoneyDeposit Insurance Coverage Index: what a bank guarantee is really worth
The same €100,000 deposit guarantee covers 6.2 years of income in Bulgaria but only 0.96 in Ireland. We compare the legal limits in 68 jurisdictions.
68 countries · Updated -
Data study Conversions & UnitsHow the world writes numbers
29 of 57 locales write decimals with a comma, so a lone “1.000” is one in New York and a thousand in Berlin. A sourced reference to each convention.
57 locales · Updated -
Data study Lifestyle & EverydayThe Phantom-Power Index: what always-on devices really cost per year
A cable box with DVR left on standby costs about €110 a year at the EU average power price. We rank 35 always-on devices by yearly standby cost, 2025 tariffs.
35 devices · Updated -
Data study Health & BodyHealthy-Weight Standards Don’t Agree: The Global BMI Cut-off Reference
Japan and Korea call an adult obese at BMI 25; the WHO waits until 30, about 14 kg later for a 170 cm adult. We compare 8 BMI standards.
8 standards · Updated -
Data study Date & TimeFamous Dates Across 8 Calendars (and Why Your Hijri Age Is Higher)
At 33, you are already 34 in Hijri years: the lunar year is 11 days shorter. 9 famous dates, from the Moon landing to the Berlin Wall, in 8 calendars.
9 dates · Updated -
Data study Education & GradesGlobal GPA Equivalence Table
A US 3.0 GPA is a German 2.5 under the official KMK formula, and roughly a French 15/20 or an Indian 7.0 CGPA. One table, 8 grading systems.
8 grading systems · Updated -
Data study Finance & MoneyWhere tourists actually get the most VAT back
Tax-free signs advertise 18.9% VAT, but only 15.7% of the price is really VAT — and the average tourist banks 11.5% of the price after fees.
38 countries · Updated -
Data study Finance & MoneyGlobal Mortgage Affordability Index
A typical mortgage payment takes 22% of a median income in the United States, but 266% in Egypt. We rank 41 countries on 2026 data.
41 countries · Updated -
Data study Lifestyle & EverydayAI Footprint Index
A reasoning-model query uses 7.6 Wh, 32× the 0.24 Wh of a Gemini prompt. We rank 6 AI tasks by energy, water and CO₂, plus three usage habits.
6 AI tasks · Updated -
Data study Finance & MoneyRent vs Buy Crossover Index
Buying a home beats renting from year 2 in the United States, and never within 40 years in 4 countries. We rank 41 countries on 2026 data.
41 countries · Updated
How-to guides
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How to convert your CGPA or percentage for studying abroad
Education & Grades · 7 min read · Updated -
What a bell curve really does to your grade
Education & Grades · 7 min read · Updated -
How grading systems work around the world
Education & Grades · 8 min read · Updated -
How much house can I afford?
Finance & Money · 5 min read · Updated -
Should I rent or buy a home?
Finance & Money · 5 min read · Updated -
How to pay off your mortgage early
Finance & Money · 6 min read · Updated