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.

Options & equity derivatives

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

Bonds & rates

• Reach for this first
• Accrued interest & dirty priceStarter — what you actually pay.
• Real return after inflationStarter — Fisher's equation, exactly.
• Cash-flow NPV & IRR solverStarter — six cash flows, hurdle rate, verdict.
• Loan & mortgage amortisationStarter — payment, total interest, the first-payment split.
• Bond ladder plannerStarter — rungs, average yield, annual income.
• Bond price, duration & convexityPractitioner — the full price–yield toolkit.
• Yield-to-maturity solverPractitioner — from price to yield by bisection.
• Swap MTM & DV01Practitioner — annuity, DV01, payer/receiver value.
• Going deeper
• Tax-equivalent yieldStarter — comparing tax-exempt and taxable bonds.
• Implied forward ratePractitioner — the rate hidden between two curve points.
• FRA settlementPractitioner — lock a future rate, settle the difference.
• Carry & roll-downPractitioner — what a position earns if the curve stands still.
• Breakeven inflationPractitioner — nominal vs. linker, and whose view wins.
• Where a bond’s value sitsPractitioner — coupons against principal, off a zero curve.
• Specialised
• Bootstrap zero rates from par yieldsSpecialist — where discount factors actually come from.
• Bullet vs. barbell at equal durationSpecialist — convexity bought, curve risk taken on.
• Bond future invoice price & net basisSpecialist — carry, financing and the cheapest to deliver.
• Swaption pricerSpecialist — the option on a swap, priced on the forward rate and its annuity.

Credit

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

FX & money markets

• Reach for this first
• T-bill yieldsStarter — discount rate, bond-equivalent, effective.
• Nominal → effective yield (APY)Starter — what compounding frequency is worth.
• Leverage break-evenStarter — the return the borrowing has to clear first.
• Cross rate & triangular arbitrageStarter — the consistency check between three quotes.
• Covered interest parity / forward pointsPractitioner — the no-arbitrage forward.
• Position sizing from riskPractitioner — size follows risk, never the reverse.
• Margin-call simulatorPractitioner — the distance to the call and to the wipeout.
• Going deeper
• Netting efficiencyStarter — how much of the gross never has to move.
• Carry trade arithmeticPractitioner — differential, leverage, breakeven.
• Repo haircut → leveragePractitioner — the system's leverage dial.
• Currency-hedged yieldPractitioner — what a foreign bond really pays after hedging.
• Specialised
• Settlement-window exposurePractitioner — what a day of the cycle is worth.

Commodities & energy

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

Funds, equity & alternatives

• Reach for this first
• Compound growth & savings planStarter — the most consequential calculator here.
• Valuation quick checkStarter — P/E, PEG, implied return vs. the bond.
• MOIC & IRRStarter — private-fund return arithmetic.
• Two-asset portfolio volatilityStarter — the diversification benefit, live.
• Drawdown & recovery mathStarter — what a loss actually costs to undo.
• Lump sum vs. spreading it inStarter — the arithmetic and the honest caveat.
• Sharpe & Sortino ratioStarter — return per unit of risk taken.
• Kelly criterionStarter — the growth-optimal stake, and why to bet less.
• Rebalancing trigger & trade sizeStarter — bands, drift and the trade nobody wants to make.
• How long a pot lastsStarter — withdrawal rate against real return.
• Turning a pot into an incomeStarter — the sustainable draw, and how much one point of return moves it.
• Renting against buyingStarter — the unrecoverable cost of each, per year.
• Going deeper
• Dividend discount modelStarter — Gordon growth, on one screen.
• Fee drag over timePractitioner — what 2-and-20 compounds into.
• PE fund waterfallPractitioner — gross to LP-net, past fees, pref and carry.
• Hedge ratio & residual riskPractitioner — how many contracts, and what stays behind.
• Exit cost & days to unwindPractitioner — what leaving a position actually costs.
• Rental yield, cap rate & cash-on-cashPractitioner — where leverage stops helping.
• Closed-end fund discount & re-ratingPractitioner — what closing the gap is actually worth.
• ETF premium against the arbitrage bandPractitioner — when a discount is real and when it is stale marks.

Risk measurement

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

Valuation & cost of capital

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

Costs

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

Corporate actions

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

Inflation & monetary policy

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

Protection & behaviour

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

Digital assets

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

Two that are not calculators

• Options strategy builder Practitioner — 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.
• Flashcards Starter — the glossary as a spaced-repetition deck, for the terms rather than the arithmetic.