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Feature

Rivers, Mountains and Cool Calculators

In keeping with this month's theme, here are the world's longest rivers, tallest mountains and 15 free calculators that you didn't know you needed.

The Longest Rivers in the World

Nile – 6,650 km (4,130 mi) – runs through through 10 countries - Uganda, Ethiopia, Sudan, South Sudan, Democratic Republic of the Congo, Kenya, Tanzania, Rwanda, Burundi, and Egypt

Amazon – 6,400 km (3,976 mi) – Brazil, Peru, Colombia

Yangtze – 6,300 km (3,917 mi) – China

Mississippi-Missouri – 6,270 km (3,902 mi) – United States

Yenisey – 5,539 km (3,445 mi) – Russia

Yellow River – 5,464 km (3,395 mi) – China


Tallest Mountains by Continent

Continent Mountain Elevation (m) Location
Asia Mount Everest 8,848 Nepal/China border
South America Aconcagua 6,961 Argentina
North America Denali (Mount McKinley) 6,194 Alaska, United States
Africa Kilimanjaro 5,895 Tanzania
Europe Mount Elbrus 5,642 Russia (Caucasus Mountains)
Antarctica Vinson Massif 4,892 Sentinel Range, Antarctica
Australia Mount Kosciuszko 2,228 New South Wales, Australia

Data are based on the Seven Summits entries from Wikipedia

If one considers the broader Australia/Oceania landmass (including New Guinea), Puncak Jaya (Carstensz Pyramid) at 4,884 m in Indonesia holds the title for that continental shelf

Sources: Wikipedia | Bing,com


15 Free Online Calculators

BMI Calculator: Compute your Body Mass Index by gender and provide your body dimensions. The free BMI calculator will estimate your body mass index and let you know in which category your weight falls.

Auto Loan Calculator: See an estimate of your monthly car payment based on vehicle price, interest rate, down payment and more.

Mortgage Calculator: Break down monthly mortgage payments into principal, interest, down payment amount, loan term, taxes, insurance, PMI, HOA fees and other components to plan a home-buying budget effectively.

Unit Converter: Convert between lengths, weights, volumes, temperatures, and more all in one place.

Currency Converter: Get up-to-date foreign exchange rates and instantly convert amounts between world currencies.

Distance Calculator: Find the distance between cities or places and show the distance in miles and kilometers. Air distance (also called great circle or orthodrome) is also drawn on the distance map.

Online Graphing Calculator: Plot functions, explore graph properties, and analyze mathematical behaviors interactively.

Percentage Calculators: Calculate percentage values, percentage changes, convert decimals to percentages, precent changes, error, differences, and more.

Ohm’s Law Calculator: Solve for voltage, current, resistance, or power in electrical circuits using V = IR relationships.

Kinetic Energy Calculator: Compute the kinetic energy, velocity, or mass of the object. This KE calculator takes the values of two objects to find the value of 3rd one..

Discount Calculator: Calculate the list price, discount percentage or sale price given the other two values. You will also find the discount savings amount. Calculate Discount from List Price and Sale Price and get a percentage.

Fractions Calculator: Perform addition, subtraction, multiplication, and division on fractions, including mixed numbers and improper fractions.

BudgetCalculator: Use this calculator to create your personalized spending plan with inputs for expenses like housing, groceries, utilities, clothing, and more to get monthly and annual budget and discretionary income calculations.

Total Daily Energy Expenditure (TDEE) Calculator: Factor in your activity levels to determine how many calories you burn per day.

Enterprise Value Calculator: Calculate enterprise value, a measure of a company's total value with inputs for market capitalization, minority interest, debt, preferred shares, cash and equivalent variables.

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Untitled FASTPAGES: 1. Cover \ 2. From the Publisher's Desk \ 3. Contents /Credits \ 4. Calendar \ 5. State of the World \ 6. Feature \ 7. Sports \ 7a. Sports Extra \ 8. Money \ 9. Food & Drink \ 10. Books \ 11. Public Domain / Toast of the Town \ 12. Back Page \ Marketplace \ Daily Idler \ Home \ | idleguy.com September 2025 | Page 6