Trading Calculators
The glossary explains what things are and the how-to guides are procedures. These are the arithmetic — the numbers you need before a decision rather than after it.
Every calculator here shows its working. The formula is on the page, the worked example runs it by hand, and the failure section says where the number stops being reliable. A calculator that gives you a figure and hides how it got there is asking for more trust than it has earned.
Nothing you type leaves your browser. There is no account, no saving, and no request sent anywhere — the arithmetic runs on your own machine, and the page works with JavaScript switched off.
401k Match Calculator
how much employer money your contribution rate actually captures
Breakeven After a Loss
the gain required to undo a loss of a given size
Cash-on-Cash Return Calculator
the annual cash a property returns on the cash you put in
Compound Growth Calculator
what regular contributions become over a long horizon
Crypto DCA Calculator
what regular fixed purchases would have been worth
Crypto Profit Calculator
what a trade actually returned after both fees
Currency Converter
what you actually receive after a provider's margin
DCA vs Lump Sum Calculator
the gap between investing it all now and spreading it out
Dividend Income Calculator
what a portfolio pays at a given yield, and the capital a target needs
Drawdown Recovery Calculator
the gain and the years needed to get back to a prior peak
Expectancy Calculator
the average result of one trade, in R
Fee Drag Calculator
what an annual charge removes from a pot over decades
Impermanent Loss Calculator
how much less a liquidity pool is worth than simply holding
Kelly Criterion Calculator
the fraction of capital that maximises long-run growth
Leverage Decay Calculator
how far a leveraged return falls short of the simple multiple
Losing Streak Calculator
how likely a run of losses is across a number of trades
Lot Size Calculator
how many lots your risk and stop distance actually allow
Margin Call Calculator
the price at which your broker liquidates the position
Millionaire Calculator
how long a monthly contribution takes to reach a target
Mining Profit Calculator
what a mining machine earns after electricity
Mortgage Payment Calculator
the monthly payment and the total interest over the term
Option Profit Calculator
what an option position is worth at expiry
Options Breakeven Calculator
the underlying price at which an option position returns nothing
Pip Value Calculator
what one pip is worth at your position size
Portfolio Beta Calculator
how much a portfolio moves when the market moves
Portfolio Heat Calculator
your total open risk, adjusted for how correlated the positions are
Position Correlation Calculator
how much diversification a set of positions actually gives you
R Multiple Calculator
a trade's result measured in units of what it risked
Real Return Calculator
what a return is worth after inflation
Rebalancing Calculator
how far a holding has drifted and what it takes to correct it
Rental Yield Calculator
annual rent as a percentage of a property's price, net of costs
Retirement Number Calculator
the capital your spending implies, and how long it takes to get there
Risk of Ruin Calculator
the chance a losing run empties the account
Roth IRA Growth Calculator
what annual contributions become, and how much of it is untaxed growth
Sharpe Ratio Calculator
return above cash, per unit of volatility
Swap and Carry Calculator
what holding a position overnight pays or costs
Tick Value Calculator
what one tick is worth and how many contracts your risk allows
Trading Sample Size Calculator
how many trades it takes before a result means anything
Trading Session Clock
when each market opens in your own local time
Wheel Strategy Calculator
premium collected, the cash it ties up, and the price it commits you to
40 calculators written so far. Educational, not financial advice.