About FolioFledge
FolioFledge exists because money math shouldn't require a login, a lead form, or a finance degree. We build free calculators that answer the most common personal-finance questions — savings growth, loan costs, retirement, budgets, safety nets — instantly, in plain English, with the math shown.
Who's behind this site
FolioFledge is founded and edited by Alamzeb Khan, who has spent his career where money decisions actually happen: hands-on roles across finance, sales, and marketing, working with the loans, budgets, margins, and payment plans that these calculators model. That experience shaped the site's core conviction — most people don't need financial advice as much as they need to see the math behind the decision in front of them.
He also builds and operates a portfolio of practical web tools and publications, including The Simple Toolbox (everyday utility tools), WordyLab (writing tools), EmailLeaked (email breach checking), and CryptoScoopDaily (crypto news). Years of building tools people use without a manual is why every FolioFledge calculator answers as you type, shows its formula, and never asks for your email.
You can find him on LinkedIn. Every guide and worked example on this site is written and reviewed under his editorial process, described below.
Our methodology
- Standard formulas only. Every tool uses the same amortization, compound-interest, and annuity formulas that banks and finance textbooks use — nothing proprietary, nothing "adjusted." Each calculator page publishes its exact formula.
- Verified worked examples. Every page includes a complete example — inputs, math, result — cross-checked against the closed-form formulas by hand before publishing. If you disagree with a number, you can audit it.
- The answer first. Results appear as you type. No email gates, no accounts, no "download your report" traps.
- Privacy by architecture. All calculations run in your browser. The numbers you enter never touch our servers — there is nothing to leak, sell, or subpoena.
How every number gets verified
Before a calculator ships, its worked example is computed three independent ways: by the calculator's own code, by the closed-form formula on paper, and by re-deriving the intermediate steps — effective monthly rates, amortization factors — separately. The three must agree to the dollar. When a figure appears in prose ("$400.76 per month," "$408,142 in interest"), it is the tool's actual output, never a rounded guess. If an assumption changes, every dependent figure on the site is recomputed the same day.
What the tools deliberately leave out
We'd rather be honest about limits than falsely precise. The calculators assume constant rates (real returns arrive unevenly), exclude taxes unless stated (your bracket is yours), and ignore inflation except where a tool explicitly models it. Each calculator lists its specific assumptions beside the results, because a projection you can't interrogate is marketing, not math.
How the site is funded
FolioFledge is supported by on-page advertising and may include affiliate links to financial products. Funding never changes a calculator's output: the formulas are fixed, published on each page, and identical for every visitor. See the disclaimer for the full policy.
What we are not
We are not financial advisors, and nothing on this site is financial, investment, tax, or legal advice. Our tools are educational: they show what standard formulas say about the numbers you enter. Decisions — and the licensed professionals you consult for big ones — are yours.
Corrections policy
Accuracy is the entire product. If you find an error in a formula, example, or explanation, tell us via the contact page with the page URL — verified corrections ship before any other work.