Calculators

Every tool in the atlas, in one place. Each runs entirely in your browser — nothing is sent or stored anywhere — and each link jumps straight to the tool on its page.

Away from a screen? Every asset class also has a printable crib sheet — the whole shelf, what moves it and which failure mode decides, on one page.

Options & equity derivatives

• Reach for this first
• Black–Scholes pricerMedium — price a call and put, see all the Greeks.
• Implied volatility solverMedium — recover the vol a market price contains.
• Knock-out certificateMedium — leverage, barrier distance, P&L per 1% move.
• Straddle breakeven / implied moveMedium — what an event is priced to deliver.
• Volatility converterMedium — annual ↔ daily, expected move over any horizon.
• Probability of expiring in the moneyMedium — N(d₂) versus delta.
• Going deeper
• Discount certificate profileMedium — discount, cap, sideways return, buffer.
• Garman–Kohlhagen FX option pricerMedium — Black–Scholes with two interest rates.
• Put-call parity checkMedium — the model-free relationship, tested.
• Index future fair value & basisMedium — carry, dividends, rich or cheap.
• Gamma scalping P&LMedium — convexity against decay, and the breakeven move.
• Probability of hitting a barrierMedium — touching is twice as likely as finishing beyond.
• Option elasticityMedium — the leverage an option really gives you, which is not its delta.
• Specialised
• Binomial tree — American vs. EuropeanHard — what the right to exercise early is actually worth.
• The averaging discountHard — what “average of the final twelve closes” costs you.
• The worst-of termHard — why a second underlying nearly doubles the breach probability.

Bonds & rates

• Reach for this first
• Accrued interest & dirty priceEasy — what you actually pay.
• Real return after inflationEasy — Fisher's equation, exactly.
• Cash-flow NPV & IRR solverEasy — six cash flows, hurdle rate, verdict.
• Loan & mortgage amortisationEasy — payment, total interest, the first-payment split.
• Bond ladder plannerEasy — rungs, average yield, annual income.
• Bond price, duration & convexityMedium — the full price–yield toolkit.
• Yield-to-maturity solverMedium — from price to yield by bisection.
• Swap MTM & DV01Medium — annuity, DV01, payer/receiver value.
• Going deeper
• Tax-equivalent yieldEasy — comparing tax-exempt and taxable bonds.
• Implied forward rateMedium — the rate hidden between two curve points.
• FRA settlementMedium — lock a future rate, settle the difference.
• Carry & roll-downMedium — what a position earns if the curve stands still.
• Breakeven inflationMedium — nominal vs. linker, and whose view wins.
• Where a bond’s value sitsMedium — coupons against principal, off a zero curve.
• Specialised
• Bootstrap zero rates from par yieldsHard — where discount factors actually come from.
• Bullet vs. barbell at equal durationHard — convexity bought, curve risk taken on.
• Bond future invoice price & net basisHard — carry, financing and the cheapest to deliver.
• Swaption pricerHard — the option on a swap, priced on the forward rate and its annuity.

Credit

• Reach for this first
• CDS spread → default probabilityMedium — the credit triangle.
• Going deeper
• Spread-duration P&LMedium — the credit trader's mental arithmetic.
• Tranche loss calculatorMedium — where a portfolio loss lands in the stack.
• Expected loss & breakeven spreadMedium — default probability times the loss when it happens.
• Altman Z-scoreMedium — the 1968 distress screen, still in use.
• Downgrade risk against default riskMedium — most credit loss is the first, not the second.
• Specialised
• Distance to a CoCo triggerMedium — the headroom, and why the trigger is rarely what fires.
• CDS–bond basisHard — the classic relative-value gap.
• Z-spread, I-spread & G-spreadHard — one bond, three spread measures.

FX & money markets

• Reach for this first
• T-bill yieldsEasy — discount rate, bond-equivalent, effective.
• Nominal → effective yield (APY)Easy — what compounding frequency is worth.
• Leverage break-evenEasy — the return the borrowing has to clear first.
• Cross rate & triangular arbitrageEasy — the consistency check between three quotes.
• Covered interest parity / forward pointsMedium — the no-arbitrage forward.
• Position sizing from riskMedium — size follows risk, never the reverse.
• Margin-call simulatorMedium — the distance to the call and to the wipeout.
• Going deeper
• Netting efficiencyEasy — how much of the gross never has to move.
• Carry trade arithmeticMedium — differential, leverage, breakeven.
• Repo haircut → leverageMedium — the system's leverage dial.
• Currency-hedged yieldMedium — what a foreign bond really pays after hedging.
• Specialised
• Settlement-window exposureMedium — what a day of the cycle is worth.

Commodities & energy

• Reach for this first
• Cost of carry & roll yieldMedium — fair futures value, contango reading.
• Going deeper
• 3-2-1 crack spreadMedium — the refinery margin as a number.
• Cash-and-carry vs. full carryMedium — what sets the shape of a commodity curve.
• Specialised
• Fuel switching & the carbon priceHard — where gas undercuts coal.
• Degree-day contract settlementHard — how a weather derivative pays out.

Funds, equity & alternatives

• Reach for this first
• Compound growth & savings planEasy — the most consequential calculator here.
• Valuation quick checkEasy — P/E, PEG, implied return vs. the bond.
• MOIC & IRREasy — private-fund return arithmetic.
• Two-asset portfolio volatilityEasy — the diversification benefit, live.
• Drawdown & recovery mathEasy — what a loss actually costs to undo.
• Lump sum vs. spreading it inEasy — the arithmetic and the honest caveat.
• Sharpe & Sortino ratioEasy — return per unit of risk taken.
• Kelly criterionEasy — the growth-optimal stake, and why to bet less.
• Rebalancing trigger & trade sizeEasy — bands, drift and the trade nobody wants to make.
• How long a pot lastsEasy — withdrawal rate against real return.
• Turning a pot into an incomeEasy — the sustainable draw, and how much one point of return moves it.
• Renting against buyingEasy — the unrecoverable cost of each, per year.
• Going deeper
• Dividend discount modelEasy — Gordon growth, on one screen.
• Fee drag over timeMedium — what 2-and-20 compounds into.
• PE fund waterfallMedium — gross to LP-net, past fees, pref and carry.
• Hedge ratio & residual riskMedium — how many contracts, and what stays behind.
• Exit cost & days to unwindMedium — what leaving a position actually costs.
• Rental yield, cap rate & cash-on-cashMedium — where leverage stops helping.
• Closed-end fund discount & re-ratingMedium — what closing the gap is actually worth.
• ETF premium against the arbitrage bandMedium — when a discount is real and when it is stale marks.

Risk measurement

• Reach for this first
• How many holdings is enoughEasy — the diversification curve and the floor it cannot pass.
• Value at Risk & expected shortfallMedium — the threshold, the tail behind it, and the health warning.
• Five-sleeve allocation builderMedium — return, risk, real return, a shock scenario and which sleeve drives it.
• Three-asset portfolio riskMedium — where risk shares stop matching weight shares.
• Scenario stress testMedium — equities, rates and spreads shocked together.
• Going deeper
• Beta hedge ratioMedium — how many index futures neutralise a stock book.
• Tracking error & information ratioMedium — and how many years proof actually takes.

Valuation & cost of capital

• Reach for this first
• CAPM cost of equityMedium — risk-free plus beta times the premium.
• WACC & the tax shieldMedium — the hurdle every project must clear.
• Enterprise value bridge & multiplesMedium — EV/EBITDA, leverage, and what P/E hides.
• Discounted cash flow with a terminal valueMedium — and how much of the answer that one assumption is.
• Going deeper
• Reverse DCFMedium — what growth the current price already assumes.

Costs

• Reach for this first
• Total cost of ownershipEasy — charges, tracking drag and both spreads, compounded.
• Spread & commission cost of tradingEasy — the hurdle turnover creates.
• Withholding and dividend tax dragEasy — the cost that never appears as a fee.
• Tracking difference, decomposedMedium — the only cost measure that catches everything.

Corporate actions

• Reach for this first
• Buyback vs. dividendEasy — the mechanical EPS uplift, and what it does not prove.
• Going deeper
• Rights issue TERP & the value of a rightMedium — why the ex-date drop is arithmetic.
• M&A EPS accretion / dilutionMedium — a financing statement dressed as a valuation.

Inflation & monetary policy

• Reach for this first
• Purchasing power over timeEasy — the loss that needs no market move.
• Going deeper
• Fixed vs. indexed paymentsMedium — what escalation is actually worth.
• Inflation-linked bond upliftMedium — principal, coupons and the nominal-equivalent yield.
• Taylor rule policy rateMedium — the benchmark every committee is measured against.
• How many moves are priced inMedium — the arithmetic behind "markets expect".

Protection & behaviour

• Reach for this first
• Deposit protection coverageEasy — brands, licences and what is actually covered.
• Volatility to risk classEasy — the 1–7 indicator, and what it leaves out.
• The cost of missing the best daysEasy — why timing fails arithmetically.
• Going deeper
• How deep a dip must beEasy — the price of waiting to invest.
• Bail-in waterfallMedium — who absorbs a bank loss, in order.

Digital assets

• Reach for this first
• Leverage decay (volatility drag)Easy — the hidden toll of daily leverage.
• Perp funding APR/APYMedium — what an 0.01%/8h really costs.
• Going deeper
• Staking yield after commission and issuanceEasy — how much of it is real.
• Impermanent lossMedium — the LP's cost versus holding.

Two that are not calculators

• Options strategy builderMedium — an extra rather than a starting point: combine up to eight legs and watch the joint payoff, breakevens, Greeks and a scenario table take shape. It is also embedded on the equity derivatives page, next to the products it describes.
• FlashcardsEasy — the glossary as a spaced-repetition deck, for the terms rather than the arithmetic.