Calculation & Decision 114

Free online RMB capital amount converter supporting single and batch amount conversion to Chinese capital amounts. Automatically formats decimals, currency units and formats to avoid manual errors. Suitable for contracts, invoices, reimbursement forms, receipts, IOUs and other formal document filling

Free online English amount capital converter tool, one-click conversion of numbers to standard English capital amount format. Supports USD, CNY, GBP, EUR, JPY and other common currencies, suitable for international trade contracts, international check writing, commercial invoice creation and financial reimbursement scenarios

Free online personal loan calculator supporting equal payment and equal principal repayment methods, accurately calculating monthly payment, total interest and repayment schedule

Free online number English converter tool supporting bidirectional conversion between numbers and English. Provides multiple output formats: lowercase, uppercase, capitalized, with hyphen option support.

Free online number to Chinese capital converter tool supporting conversion of Arabic numerals to Chinese capital numbers. Provides normal mode and currency mode, suitable for financial accounting, invoice filling, contract amount verification and other scenarios.

Free online personal income tax calculator supporting salary, service fees and other income types. Automatically calculates social insurance, housing fund and special additional deductions, provides detailed tax breakdown and monthly summary table for accurate tax calculation.

Online VAT calculator for gross/net sales conversion, output/input VAT deduction, and payable tax estimation for invoicing review and filing scenarios.

Online corporate income tax calculator for taxable income, payable tax, and net profit estimation from revenue, costs, and adjustments.

Professional number thousands formatter supporting custom thousands separator, decimal separator, decimal places and rounding mode, with single and batch formatting support

Accurately calculate the actual annual interest rate, total fees and monthly payment amount of credit card installments using IRR method

Compare minimum, full, installment, and custom repayment strategies with interest, fee, payoff period, and schedule estimates

Provides conversion between taxed and untaxed amounts, tax amount calculation, tax rate reverse calculation, supports custom tax rates and exemption amounts

Support 160+ global currencies real-time exchange rate conversion, bidirectional conversion, accurate to 4 decimal places, display exchange rate and update time

Support comparison of purchase tax policies for different years from 2024 to 2028, accurately calculate exemption amounts, taxable amounts and actual taxes, help plan optimal car purchase timing

Accurately calculate buy-sell price difference profit for T+0 trading, automatically deduct commission, stamp tax, transfer fees and other trading costs, support both share-based and amount-based calculation modes

Online loan repayment plan calculator supporting equal payment and equal principal, with real-time monthly payment, total interest, total repayment, amortization schedule, and yearly chart export.

Online investment return calculator with ROI, compound growth, and SIP modes to estimate net profit, annualized return, doubling time, and value trend

Online investment return and risk calculator with lump-sum, recurring, and portfolio analysis to output returns, risk level, and suggested holding period for planning

Online retirement planning calculator for estimating retirement target amount, monthly savings, income gap, and readiness score, suitable for pension planning and long-term financial decisions.

Online corporate financial health assessor with current ratio, debt ratio, net profit margin, ROE, and gross margin analysis, plus score, risk level, and business suggestions.

Online stock trading profit calculator with buy/sell P&L, fees, holding analysis, and multi-trade summary for A-share and custom tax rule scenarios.

Online fund SIP return calculator supporting monthly, quarterly, and weekly projections with management fee, purchase fee, and inflation impact for long-term planning.

Online year-end bonus calculator supporting separate and combined taxation estimation, comparing one-time and monthly payout plans with after-tax income, effective rate, and settlement results.

Online crowdfunding investment ROI calculator with projected return, failure probability, platform fee, and risk-adjusted return estimation

Online personal pension calculator for tax deduction estimation, retirement return projection, and multi-plan comparison to evaluate tax savings and long-term pension accumulation.

Online rental yield calculator with gross/net yield, mortgage analysis, cash-flow estimation, and leveraged return metrics for buy-to-let investment evaluation.

Online forex arbitrage profit calculator to estimate spread gain, spread cost, commission, and swap impact, and quickly evaluate net arbitrage profit and return rate.

Online education savings planning calculator with tuition inflation, investment return, funding gap, and monthly savings estimation for family education fund preparation.

Online insurance premium calculator for life, health, car, and property insurance with annual/monthly premium estimation, total cost calculation, and plan comparison export

Online corporate financial ratio analyzer for profitability, solvency, and efficiency ratios with industry benchmark comparison and financial health scoring

Online depreciation calculator supporting straight-line, double-declining-balance, and sum-of-years-digits methods with yearly schedule output

Online sales tax calculator with two-way net/gross conversion, real-time tax amount calculation, and quick preset tax rates

Calculate BMI (Body Mass Index) from height and weight and assess health risk

Calculate target weight, healthy range and BMI from height and sex, with side-by-side ideal weight formula comparison

Calculate perimeter/area (2D) and surface area/volume (3D) with formulas and preview

Calculate max heart rate, target BPM, and five training zones from age and resting heart rate with multiple formulas and HRR mode

Online BMR calculator with TDEE estimation, activity level selection, and calorie guidance for fat loss or muscle gain

Online body fat calculator using the U.S. Navy circumference method to estimate body fat, fat mass, and lean mass for fitness and weight management

Online blood pressure staging assessment with BP staging, trend statistics, local records, and CSV export for home monitoring and follow-up care

Online sleep quality assessment with sleep efficiency scoring, metric breakdown, and actionable tips for daily health tracking, schedule adjustment, and recovery planning

Online nutrition needs calculator for daily calories and macro estimation, with fiber and water guidance for fat loss, muscle gain, and meal planning

Online water intake calculator that estimates daily hydration from weight, age, activity, and climate, with drinking schedule and beverage water conversion

Online waist-to-hip ratio calculator with WHR estimation from waist and hip measurements, plus male/female risk bands, trend guidance, and measurement tips.

Estimate calories burned by weight, duration, activity type, and intensity with MET comparison and training reference

Estimate health age from BMI, waist, blood pressure, sleep, and lifestyle, with key factors and practical improvement tips

Online skinfold thickness calculator with 3-site and 7-site inputs to estimate body fat and body density with category classification for fitness testing

Online 1RM one-rep max calculator with multi-formula estimation and training load ranges for bench, squat, and deadlift planning

Online waist-to-height ratio calculator with WHtR estimation from waist and height, plus underweight-to-obesity risk bands, measurement guidance, and health tips

Online body measurement tracker with circumference logging, WHR/WHtR analysis, trend charts, and CSV import/export for fitness progress and physique tracking

Online flexibility assessment test with multi-area scoring, total level conversion, and targeted stretching guidance for training reference

Online running pace calculator with pace-time conversion, split pace estimation, and common race distance presets from 5K to marathon training

Online workout plan generator that creates weekly training schedules from age, experience, goals, training frequency, and equipment, with exercise/cardio guidance and downloadable plans

Online calorie counter with daily target estimation, food calorie logging, and intake progress tracking for fat loss, muscle gain, and diet management

Online food portion converter with ingredient density-based gram/milliliter conversion, spoon/cup kitchen measures, and baker ratio estimates for meal prep and baking

Online macro nutrient tracker with daily protein, carb, and fat goals, food logging, and progress visualization for fat loss and muscle gain diet management

Online weekly meal planner that generates seven-day menus by calorie goals, meal count, and diet preferences, with macro summaries and shopping list output

Online drinking habit tracker with daily beverage logging, hydration goal progress, and 7-day intake trends to help build consistent hydration routines

Online VO2 max calculator supporting resting heart rate, Rockport walk, Cooper run and beep test to estimate VO2max, MET and cardio fitness level

Online respiratory rate assessment with timer tap counting and manual input to calculate breaths per minute and resting-range assessment for home monitoring

Estimate cardiovascular fitness age and VO2max from resting heart rate, body metrics, and habits, with tiered advice and training goals

Online sleep cycle calculator with bedtime-wake time planning, cycle-based recommendations, sleep stage reference, and sleep debt estimation for routine optimization

Assess morning-evening tendency with the MEQ scale and get score bands, wake-bedtime suggestions, and focus window guidance for routine planning

Online osteoporosis risk self-check tool that evaluates bone density risk from profile and risk factors with practical intervention guidance

Online posture self-check and correction guide with forward head, rounded shoulder, kyphosis, pelvic tilt, and leg alignment assessment plus training suggestions

Online sedentary time calculator for daily sitting duration with risk levels, break count, and activity suggestions from period or weekly inputs.

Estimate due date, gestational week, delivery window, and milestones from LMP and cycle length for prenatal schedule planning

Estimate child height and weight percentiles and growth status from age, sex, height, and weight for home tracking

Online goal weight planner with timeline estimation, daily calorie targets, and phase milestones for fat loss, muscle gain, and weight management planning

Online health habit check-in tracker with daily habit toggles, custom habits, streak tracking, and achievement badges to build consistent wellness routines

Professional random number generator supporting integer and float generation with uniqueness, sorting, decimal places and other parameter settings

Online random dice roller with multiple dice sides, dice count and modifier settings, plus roll history and summary statistics

Online random coin flip tool with single or batch tosses, custom options, probability statistics, and history for classroom demos and quick decisions

Online what to eat today picker with cuisine, meal time, budget and taste filters, one-click meal suggestions and quick recommendation stats

Online random picker with equal, non-repeating, and weighted selection modes, including history and result stats for raffles, task assignment, and quick decisions

Online random team grouping tool with split-by-team-count or split-by-team-size modes, plus balanced grouping, manual adjustment, export, and history restore for classes and team collaboration

Online random roll call tool with single, batch, lottery, and round-robin modes, including fairness weighting, result stats, copy, and export for classes and meetings

Generate normally distributed (Gaussian) random numbers using Box-Muller algorithm with customizable mean and standard deviation, histogram visualization and data export

Online random wheel tool with custom items, colors, and weights, featuring animated spins and history tracking for raffles, classroom interactions, and quick decisions

Powerful scientific calculator with basic operations and advanced functions

Simplify aspect ratio from width/height with presets, custom ratios, dimension conversion and proportional scaling

Convert numbers between binary, octal, decimal, hexadecimal and any base from 2-36

Quickly calculate the sum of any numbers, supporting multiple separators like line breaks and commas, automatically filtering invalid content

Professional average calculation tool supporting arithmetic mean, geometric mean, quadratic mean, harmonic mean, median, mode and other statistical calculations

Professional online statistical tool supporting batch data input and automatically generating statistical tables. Quickly calculates the average and sum of each row of data, providing column averages and overall statistical results. Suitable for data analysis, learning calculations, financial statistics and other scenarios

Calculate PDF, CDF and quantiles (inverse CDF) of normal distribution. Supports curve plotting and random sampling, local-first, simple and free

Professional Roman numeral converter supporting bidirectional conversion between Roman and Arabic numerals with real-time conversion, step breakdown and one-click copy

Online bitwise calculator with AND, OR, XOR, NOT, shifts and multi-base inputs, featuring 8/16/32-bit visualization for debugging and bitmask design

Online pivot analysis tool with CSV/JSON import, row-column grouping, aggregation, and pivot table CSV export for reporting and data summaries

Online percentage calculator for ratio, increase/decrease, percent difference, discount, and tax estimation in operations, finance, and daily decisions

Online probability calculator for basic probability, permutations, combinations, conditional probability, Bayes theorem, binomial and normal distribution

Online matrix calculator supporting add/subtract/multiply, transpose, determinant, inverse, LU/QR/SVD decomposition, rank, eigenvalues, norms, and condition number

Online fraction calculator supporting add/subtract/multiply/divide, simplification, common denominator, decimal conversion, mixed-number conversion, and fraction comparison

Online statistics calculator with descriptive stats, frequency distribution, regression analysis, normality checks, and t-test for study and analysis

Online equation solver for linear, quadratic, and two-variable linear systems with graph plotting, Newton iteration, equation analysis, and solve history

Online discount calculator with discount-rate and markdown conversion, extra deduction stacking, and instant final price, savings, and effective discount rate

Online tip calculator with preset/custom tip, pre-tax/after-tax basis, and split bill support to get total due, per-person payable, and per-person tip quickly

Online vector calculator supporting 2D/3D add/subtract, dot/cross product, angle, and projection for study, modeling, and engineering analysis

Online GPA calculator with 4.0/5.0/custom scales, real-time GPA and weighted score calculation, plus target GPA reverse planning

Online complex number calculator supporting arithmetic, modulus and argument, polar and exponential form, conjugate, square root, reciprocal, and related operations

Online speed calculator for speed, time, and distance conversion with km/h, m/s, mph, knots, and Mach outputs

Online fuel consumption calculator to quickly estimate L/100km, total fuel cost, and cost per kilometer from distance, fuel used, and fuel price

Online big number calculator for exact BigInt integer arithmetic, factorial, and power operations with copyable output

Online proportion calculator for solving unknowns in a:b=c:d, ratio scaling, and recipe adjustment, ideal for size conversion, price checks, and study practice

Online sequence calculator for arithmetic and geometric progressions with first-n sum, nth-term formula display, and term generation for study and quick engineering checks

Online safe period and ovulation calculator for predicting ovulation day, fertile window, safer days, and next period for planning and cycle tracking

Online unit price comparison calculator with per-unit conversion and two-product price comparison to quickly identify the better-value option

Online ETA calculator that estimates total duration and finish time from workload, processing rate, and start time for scheduling and progress management