CalcNimbus Blog
Articles, guides, and tips to master your financial, tax, and everyday calculations.
How Much House Can I Afford? The 28/36 Rule Explained
Use the 28/36 rule to figure out how much house you can really afford. We walk through a full $90k-income example and the hidden costs lenders ignore.
How Much Should You Have Saved by Each Age?
Wondering how much you should have saved by 30, 40, or 50? Here are the popular salary-multiple benchmarks, why they're guidelines not rules, and how to catch up.
How Much Water Should You Drink a Day?
The 8x8 rule is a myth. Here's how much water you actually need based on body weight, exercise, climate, and pregnancy, plus the real signs of dehydration.
How to Calculate a Tip (and Split the Bill)
Tipping in the US runs 15-20% for sit-down service. Here's how to calculate a tip fast, whether to tip on the pre-tax or total amount, and how to split a bill evenly with a worked $80 example.
How to Calculate Your Car Payment
Your car payment depends on the amount financed, your APR, and the loan term. Here's the formula, a fully worked example with sales tax, and how term length affects total interest.
How to Calculate Your Due Date (Last Period vs IVF)
Your due date is an estimate, not a deadline. Here's how to calculate it from your last period with Naegele's rule, how IVF dating differs, and why only 1 in 20 babies arrives on the day.
How to Calculate Your Monthly Mortgage Payment (PITI Explained)
PITI stands for principal, interest, taxes, and insurance — the four parts of your monthly mortgage payment. Here's the formula, a worked $400k example, and how to estimate yours.
How to Calculate Your Net Worth
Net worth is everything you own minus everything you owe. Here's what counts on each side, why it's the real wealth scoreboard, and a full worked balance sheet.
How to Calculate Your Take-Home Pay
Take-home pay is what actually lands in your bank account after taxes and deductions. Here's the step-by-step gross-to-net formula, a worked $70k example, and why net is so much lower than gross.
How to Calculate Your TDEE (Total Daily Energy Expenditure)
Your TDEE is the total calories you burn in a day. Here's how to calculate it from your BMR and activity level, plus how to use it to lose fat or build muscle.
How to Fill Out a W-4 to Avoid Owing or Overpaying
Your W-4 controls how much tax comes out of every paycheck. Here's a step-by-step walkthrough of all five sections, how to balance a refund against bigger paychecks, and a worked example.
How to Pay Off Credit Card Debt Faster
Minimum payments can stretch a $5,000 balance into 16 years and nearly $7,000 of interest. Here's how to escape the trap and pay off credit card debt years faster.