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Public tools
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Today at a Glance
A quick daily snapshot from the calculators below — nothing new to sign in for.
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World Time
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Currency
Indicative rates only, not real-time — for reference, not transactions.
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Main hubs
Guides for everyday life
Short guides on preparedness, health, money, food, and the home.
How Many Days of Emergency Supplies Do You Need? A Complete Guide to Water, Food, Daily Essentials, and Rolling Stock by Household Size
When people think about disaster preparedness, water and emergency food are usually the first things that come to mind. But a useful household stockpile is not just about deciding what to buy. You also need to know how many days your household should be able to manage, how much you already have, what is missing, and how you will manage expiration dates and replacement cycles.
Should You Replace an Old Appliance? How to Compare Electricity Cost, Annual Energy Use, and Payback Period
When a refrigerator, air conditioner, washing machine, or other appliance has been in use for many years, a common question is whether it is cheaper to keep using it until it fails or replace it with a newer, more energy-efficient model.
Best-Before vs. Use-By: How to Reduce Food Waste While Managing Food Safely
When cleaning the refrigerator, you may find food with a best-before date from yesterday and wonder whether it should be thrown away.
How Many Hours Should You Sleep? A Practical Guide to Sleep Duration, Restfulness, and Daily Habits
“How many hours of sleep do I need?” is one of the most common questions about daily health.
When Should You Do Home Maintenance? A Practical System for Cleaning, Filters, Cartridges, Smoke Alarms, and More
A home contains many things that are easier to manage before they fail.
Are You Really Saving in a Sale? A Practical Guide to Discounts, Tax-Inclusive Prices, Original Prices, and Shopping Percentages
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Categories
Groups in the catalog. Counts are tools, not people.
Featured tools and data
These are the published tools and data. Open one to use it.
World population
Total population by country or area, from the World Bank World Development Indicators.
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Income and purchasing power
Compare countries using World Bank GNI per capita (Atlas method and PPP). These are not average salary figures.
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Price levels across countries
Compare GDP price levels relative to the United States (USA = 1) using World Bank data. This is not a household cost-of-living index.
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Average annual wages (OECD)
Compare OECD Average annual wages in US dollars PPP for full-time equivalent dependent employees. OECD-focused coverage — not a global salary ranking.
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Life expectancy around the world
Compare life expectancy at birth in years using World Bank data. It is the years a newborn would be expected to live if prevailing mortality patterns stayed the same.
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Fertility rates around the world
Compare total fertility rate in births per woman using World Bank data. It is the average number of children a woman would have if current age-specific fertility rates continued through her life.
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Compare countries
Compare total population across countries and areas using the same World Bank snapshot.
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Country profiles
Country pages with verified World Bank population and metadata, Unicode CLDR currency and languages when published, map highlight, and provenance.
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Popular Tools
Tools opened most often recently.
World Life SimulatorPopular
Compare population, GNI, price-level indicator, OECD wages, life expectancy, and fertility for 2–5 countries using verified public statistics only.
World Holiday & Business Day PlannerPopular
Country holiday calendars, business-day estimates, common business days across countries, and leave bridging around weekends and public holidays.
Currency ConverterPopular
Convert amounts with Frankfurter reference rates. Multi-currency, historical dates, and a history chart.
Recommended Tools
Related calculators worth trying next.
Shopping & Effective Price Calculator
Combine unit price, discounts, tax, and points to rank effective cost.
Recurring cost calculator
Convert subscriptions and fixed costs into monthly, annual, and 5-year totals.
Discount & Coupon Calculator
Sequential % discounts plus fixed coupons, and reverse from a final price.
Travel Tools
Currency, world time, holidays, and the Schengen calculator, grouped by travel moment.
Explore the world
Country and area totals on the population page are reproduced from one World Bank indicator, with the source, license, and update date on the page.
Open the population shellCompare countriesBrowse countriesCountry profiles
Open a country page for published population, World Bank metadata, CLDR currency and government-use languages when available, map highlight, and source notes.