FIRE Calculator Alternatives, Compared Fairly

How do these tools differ at a glance?

They answer different questions, so the right one depends on what you want to know. This table sums up each tool in a line, with a link to the page where we confirmed it.

FIRE tools compared at a glance
Tool	What it is	A good fit for
Networthify	A single savings-rate calculator: years until you can retire at a fixed return^[1].	A fast, motivating answer to how much to save.
WalletBurst	Free Coast, FIRE, Fat and Barista FIRE calculators with sliders and charts^[3].	Exploring Coast FIRE visually, plus its jobs database and windfall tools.
Engaging Data	Two detailed tools: when you can retire, and whether the money lasts^[5].	Income growth, mortality tables and downloading every historical cycle.
FI Calc	A backtesting calculator for retirement withdrawal strategies^[6].	Comparing withdrawal strategies once you know your number.
ProjectionLab	A whole-life financial planning app with free and paid plans^[9].	A detailed, tax-aware plan you maintain over years.
FIRE Calculator Pro	Free FIRE calculators that run in your browser and risk-test every plan with Monte Carlo and every historical start year since 1928.	A quick, private, risk-tested answer to a FIRE question, with Social Security and pensions.

What does FIRE Calculator Pro do differently?

Several of the tools above do some of these things well. We built ours around all of them:

Risk tests on every plan. A 2,000-run Monte Carlo simulation and a replay of every historical start year in 1928-2025 US data, not just one average return.
Income that starts later. Social Security and pensions lower your target from the age they begin, so they move your FIRE number and FI age, not just the drawdown.
One plan from today. Saving and spending run through the same simulations, so a bad market before you retire counts too.
Private by design. No account and no ads, and your inputs never leave your browser. Analytics only counts visits, with consent first in the EU and UK.
Four countries. UK, Canada and Australia editions of the FIRE and Coast FIRE calculators.

We are also clear about what we leave out. We do not model tax brackets, raises, flexible spending rules or mortality, and some of the tools above do. The full list of simplifications is on the methodology page.

How do we keep these comparisons fair?

Their own pages only. Every statement about another tool comes from that tool's website, opened and read in a browser, and is cited. We do not use review sites or memory. If we could not confirm something, we left it out.
Strengths first. Each page says what the other tool does well and when you should use it instead of ours.
Numbers from our engine. Worked examples are computed by the same engine as our calculators. Where we quote another tool's result, it is the figure its own page displays, and we say so.
No ratings, no affiliate links. We do not score other products, and we earn nothing from links to them. Names are used only to identify the products; we are not affiliated with any of them.
Dated. Products change. Each page shows the date we last checked it, and we recheck when a tool changes.

Spotted something out of date?

If a comparison no longer matches a tool's site, email iamkashifcs@gmail.com with the page and what changed. We will check it and update the page with the new date.

Frequently asked questions

Which FIRE calculator should I use?

The one that answers your question. For a quick savings-rate answer, Networthify. For Coast FIRE with sliders, WalletBurst. To compare withdrawal strategies, FI Calc. For a detailed tax-aware plan, ProjectionLab. For a fast, risk-tested answer with Social Security and no account, ours. Many people use two: one to explore and one to check.

Do the other tools test plans against market history?

Some do. Engaging Data offers historical cycles and Monte Carlo modes^[4], FI Calc is built on historical backtesting but does not run Monte Carlo^[7], and ProjectionLab includes both on its free plan^[9]. Networthify and WalletBurst's Coast FIRE calculator use one steady return^[1]^[2].

Which of these tools need an account?

ProjectionLab asks you to sign up to start^[10]. FI Calc offers an optional account for saving calculations^[8]. Networthify, WalletBurst and Engaging Data ran on their pages without one when we checked^[1]^[2]^[4]. FIRE Calculator Pro has no accounts at all.

Sources

Figures checked against each source on November 11, 2026.

[1]When can I retire? · Networthify, Checked November 2026.Inputs: after-tax income, savings, expenses, savings rate and portfolio value, with more options for annual return (default 5%, after taxes and inflation) and withdrawal rate (default 4%). Stated assumptions: expenses now equal expenses in retirement, the principal is never drawn down. Default inputs ($50,000 income, $30,000 savings) show 12.4 years and a $500,000 goal. The result compares your rate with OECD household saving rates, and the site menu also links to a subscriptions cost calculator and a savings-rate-by-country page.
[2]Coast FIRE Calculator - Coasting to FI · WalletBurst, Checked November 2026.Inputs: current age, retirement age, annual spending in retirement, current invested assets, monthly contribution, growth (4-14%), inflation (2-6%) and SWR (2-6%); defaults 30, 67, $30,000, $100,000, $500, 7%, 3%, 4% show a Coast FIRE number of $175,723. Inflation is handled by subtracting the inflation rate from the growth rate; Coast FIRE number = spending / (SWR x (1 + n)^t).
[3]Tools · WalletBurst, Checked November 2026.WalletBurst's tool list: Coast FIRE, FIRE, Fat FIRE and Barista FIRE calculators, a Coast FIRE Jobs Database, windfall and one-time purchase FIRE timeline calculators, plus investing, loan and savings calculators; a Wealth Planning Toolkit for Google Sheets offered for $20.
[4]FIRE Calculator: When can I retire early? · Engaging Data, Checked November 2026.A pre-retirement calculator that projects years until retirement (it does not simulate the drawdown); three return modes: fixed real returns, historical cycles and Monte Carlo; extra income and expense streams by age; average tax rate input; values in real dollars; Shiller data; inputs are not transmitted and calculations run in the browser; shareable URL.
[5]Early Retirement Calculators and Tools · Engaging Data, Checked November 2026.Engaging Data's FIRE tools: an early retirement calculator (when can I retire?), a post-retirement portfolio survival and longevity calculator, a withdrawal rate and historical cycles visualizer, and a financial freedom calendar.
[6]FI Calc · FI Calc, Checked November 2026.Configuration: starting age, duration, portfolio value and mix, rebalancing, withdrawal strategy (constant dollar, percent of portfolio, 1/N, VPW, custom VPW, dynamic SWR, endowment, Guyton-Klinger, 95% rule, CAPE-based, Sensible Withdrawals, Hebeler Autopilot II, Vanguard Dynamic Spending), extra withdrawals, income and historical data range.
[7]Backtesting · FI Calc, Checked November 2026.Explains backtesting and its limits, and states that FI Calc does not currently support running Monte Carlo simulations.
[8]Privacy Policy · FI Calc, Checked November 2026.Inputs are processed in the browser; an optional account stores saved calculations; the site uses Google Analytics, which can receive page URLs that may contain calculator inputs.
[9]Pricing · ProjectionLab, Checked November 2026.Basic: $0 a year (forecasting, financial planning, Monte Carlo simulations, historical backtesting, flexible modeling). Premium: $129 a year (adds cash-flow projections, tax estimation and optimization, withdrawal strategies, estate planning and more). Pro for advisors: $549 a year. States it never sells your data.
[10]Get started · ProjectionLab, Checked November 2026.Getting started offers sign-up with Google or with email, or sign-in to an existing account.

FIRE calculator alternatives, compared fairly