Directorio completo
214 herramientas. Un solo sitio.
80 herramientas tienen una versión española revisada. El resto aparece con la marca EN y abre su versión inglesa, para que siempre sepas qué idioma vas a encontrar.
Mecanografía y teclado
Estudio de mecanografía
Mide velocidad, precisión y constancia, convierte tus propios errores en un ejercicio dirigido y comprueba cada tecla del teclado. Funciona en el navegador y no se sube nada.
Permutation & Combination Calculator
Count ordered permutations (nPr) and unordered combinations (nCr) for choosing r items from n distinct items.
EducaciónProbability Calculator
Calculate event probability, complement, odds, and percentage.
EducaciónRoman Numeral Converter
Convert between positive integers and standard Roman numerals.
EducaciónRounding Calculator
Round numbers to decimal places, significant figures, or a chosen increment.
EducaciónSignificant Figures Calculator
Count significant figures and round a value to the required precision.
EducaciónLinear Equation Calculator
Solve a one-variable equation in the form ax + b = c.
EducaciónSlope Calculator
Calculate slope, intercept, distance, and equation from two points.
EducaciónSample Size Calculator
Estimate survey sample size from confidence level, margin of error, and population.
EducaciónVAT Calculator
Add or remove value-added tax and show the net and tax amounts.
FinanzasPrice per Unit Calculator
Compare package prices using a normalized cost per unit.
FinanzasCAGR Calculator
Calculate compound annual growth rate between a starting and final value.
FinanzasInflation Calculator
Estimate future purchasing cost from an annual inflation rate.
FinanzasPayPal Fee Calculator
Estimate PayPal processing fees and exactly how much lands in your account.
FinanzasStripe Fee Calculator
Estimate Stripe card processing fees, or the amount to charge for a target payout.
FinanzaseBay Fee Calculator
Estimate the eBay final value fee, the per-order fee, and the profit left on a sale after your own costs.
FinanzasEtsy Fee Calculator
Estimate Etsy listing, transaction and payment processing fees on a sale, and the profit left after your costs.
FinanzasShipping Cost Calculator
Estimate shipping cost from base price, weight, distance, and surcharges.
FinanzasMarkup Calculator
Calculate selling price, markup, and margin from product cost.
FinanzasCost per Click Calculator
Calculate CPC, clicks, spend, conversion rate, and cost per acquisition.
FinanzasCustomer Lifetime Value Calculator
Estimate customer value from order size, frequency, margin, and retention.
FinanzasUpdate Shopify Prices from a CSV
Apply a supplier price list to your Shopify catalog with margin and rounding rules — and review every change before you import.
Imagen y datosUpdate Shopify Inventory from a Supplier File
Cross the weekly stock sheet from your supplier with your store and download a safe inventory update — stop selling what your supplier ran out of.
Imagen y datos