Northpeak

02 / Calculate

Run the numbers — honestly

Move a slider and the maths updates instantly. No accounts, no upsell. Every tool shows its assumptions and reminds you that an estimate is not a promise.

Compound Interest Calculator

See how a starting balance plus regular contributions can grow over time at an assumed annual return.

$
$
%

A return assumption, not a guarantee. Markets vary year to year.

yrs
Projected balance
$271,649
Total you contributed
$95,000
Growth from compounding
$176,649

Assumptions: Assumes a constant annual return and monthly compounding. Returns are not guaranteed and ignore taxes.

Mortgage Payment Calculator

Estimate the monthly principal-and-interest payment on a fixed-rate mortgage, plus total interest paid.

$
%
yrs

Principal and interest only — excludes taxes, insurance, and HOA.

Monthly principal & interest
$2,275.44
Total interest over the term
$459,160
Total of all payments
$819,160

Assumptions: Principal and interest only — excludes taxes, insurance, and HOA. Assumes a fixed rate for the full term.

Savings Goal Calculator

Work out the monthly amount needed to reach a savings target by a chosen date, with optional interest.

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$
%

E.g. a high-yield savings rate. Rates change over time.

yrs
Monthly contribution needed
$464.77
Your start grows to
$2,255

Contribute this each month and, with the assumed interest, you reach your target on schedule.

Assumptions: Assumes equal monthly contributions and a constant annual interest rate compounded monthly.

Want the reasoning behind these tools?

Read the guides