Calculator
Daily Exercise
Think first, then click Reveal Answer.
Come back tomorrow for a new exercise.
Frequently Asked Questions
How do I use these financial calculators?
First, select a calculator tab (Mortgage, Debt Payoff, Retirement, or FIRE) that fits your goal. You can adjust the inputs either by sliding the controls or typing exact numbers into the text boxes.
The Mortgage and Retirement calculators include handy Helper fields at the top. You can use these to quickly calculate your base loan amount (using home price and down payment) or your target goal (using desired monthly withdrawals).
Try these examples:
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Mortgage — What is the payment on a $500k home with 10% down at 6.5% over 30 years?
← auto fill this scenario -
Debt Payoff — How long to pay off $15k at 24% by paying $400/mo?
← auto fill this scenario -
Retirement — I have $20k, add $500/mo at 8%. What's my balance in 30 years?
← auto fill this scenario -
FIRE — I spend $4k/mo, have $100k invested, save $2k/mo, and expect 7% returns with 3% inflation. When can I reach FIRE?
← auto fill this scenario
Can I choose which value to calculate?
Yes. Unlike rigid financial calculators, you can select any field as your target result by clicking the target icon (🎯) next to it. The app will automatically solve for that specific variable as you adjust your other inputs.
Do the charts update in real-time?
Absolutely. Every adjustment you make using the sliders or text fields instantly updates the results and visual charts, allowing you to effortlessly explore different financial scenarios.
What is the Perpetual FIRE calculator?
FIRE stands for Financial Independence, Retire Early. Our Perpetual FIRE calculator estimates when your projected portfolio can perpetually support your current monthly expenses.
It starts with Current Expenses/mo, applies a 1.4 pretax buffer, grows that expense with inflation, then projects your portfolio from current savings, monthly contributions, and expected returns. When your portfolio growth can cover your inflated monthly expense perpetually, the calculator treats your FIRE goal as achieved.
Can I save or share a specific scenario?
Yes. Tap the share icon next to the calculator title to copy a custom link. Anyone who opens the link will see your exact inputs and results.
What is the 'Daily Exercise'?
It is a practical daily scenario that you can solve using one of our financial calculators. Practice choosing the right tool and target variable to build your long-term financial intuition.
Are these estimates guaranteed?
No. These financial calculators provide educational estimates based on your inputs. Real-world variables like changing interest rates, taxes, and fees are not fully captured.
Is this financial advice?
Kinced Home tools are for informational purposes only and do not constitute financial or investment advice. Always consult a qualified professional before making financial decisions.