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Online Converters: Currency, Units & Date Calculator

Online Converters

Free online conversion tools: currency exchange at current Central Bank rates, unit conversion between measurement systems, and date calculations. All converters work locally in your browser.

Online Currency Converter

Convert between 30+ currencies with up-to-date Central Bank of Russia exchange rates and rate history.

What It Is

A currency converter for instant conversion from one currency to another at the current exchange rate. Uses official Bank of Russia rates, updated daily.

Features

  • 30+ currencies β€” RUB, USD, EUR, CNY, KZT, UZS, and more
  • Current rates β€” daily-updated Bank of Russia data
  • Cross rates β€” direct conversion between any two currencies
  • Rate history chart β€” exchange rate trends over time
  • Instant conversion β€” result updates as you type

When to Use

  • Planning international travel and budgeting in a foreign currency
  • Calculating import/export costs in your local currency
  • Tracking exchange rate trends before making a currency purchase
  • Managing multi-currency income and expenses

Example

Buying an item for $150 at 85 RUB/USD = 12,750 β‚½. If the rate rises to 90 RUB/USD, the same item costs 13,500 β‚½ β€” a 750 β‚½ increase from rate fluctuation alone.

FAQ

Where do the exchange rates come from? β€” Data from the Bank of Russia official API, updated every business day.

Can I use it offline? β€” At least one successful rate fetch is required. After loading, data is cached in your browser.

Open Currency Converter β†’

Unit Converter

Universal converter between metric and imperial systems: length, weight, volume, speed, area, and more.

What It Is

A unit converter for quick translation between different measurement systems. Supports 50+ units across 6 categories.

Categories and Units

Category Units
Length meters, kilometers, miles, feet, inches, yards, cm, mm
Weight kilograms, grams, pounds, ounces, tons, stones
Volume liters, milliliters, gallons (US/UK), cubic meters
Speed km/h, m/s, mph, knots, mach
Area mΒ², kmΒ², hectares, acres, sq ft, sq miles
Temperature Celsius, Fahrenheit, Kelvin

When to Use

  • Converting recipes with US measurements (cups β†’ grams, ounces β†’ milliliters)
  • Working with international documents (inches β†’ centimeters, feet β†’ meters)
  • Calculating fuel consumption (mpg β†’ L/100km)
  • Comparing product specs from different countries

Example

A person is 5 feet 11 inches tall. In metric: 5 Γ— 30.48 + 11 Γ— 2.54 = 152.4 + 27.94 = 180.34 cm.

FAQ

Why are US and UK gallons different? β€” US gallon = 3.785 liters, UK gallon = 4.546 liters. Historically, different standards for wine (US) and grain (UK) measurements.

Open Unit Converter β†’

Date Calculator Online

Calculate date difference, add and subtract days, count working days excluding weekends.

What It Is

A date calculator for calendar-based computations. Three modes: date difference, add/subtract days, and working days calculation (Monday–Friday only, weekends skipped).

Features

  • Date difference β€” days, weeks, months, and years between two dates
  • Add/subtract days β€” add or subtract N days from any date
  • Working days β€” add N business days (Mon–Fri), skipping weekends
  • Today button β€” quick reset to current date
  • All calculations performed locally in your browser

When to Use

  • Counting days until a vacation, deadline, or important event
  • Calculating project end dates: "Starting July 15, 45 working days β€” delivery date is…"
  • Determining age or tenure: "How many years, months, and days since hire date?"
  • Planning deliveries: "Shipped August 1, 14-day transit β€” arrival date is…"

Examples

Date difference: January 1, 2026 to July 25, 2026 = 205 days (6 months, 24 days).

Add days: July 25, 2026 + 90 days = October 23, 2026.

Working days: Project starts July 1, task is 20 working days β†’ ends July 28 (Saturdays/Sundays on July 5–6, 12–13, 19–20, 26–27 are skipped).

FAQ

Are public holidays counted? β€” The current version only skips Saturdays and Sundays. Public holidays are not included β€” add them as extra skip days for precise calculations.

How is the month difference calculated? β€” Months are calendar-based. January 31 to March 1 = 1 month and 1 day (not 29 days).

Can I subtract days? β€” Yes, enter a negative number in the add days mode. Example: -30 days = 30 days ago.

Open Date Calculator β†’

See Also