Unit Converters

Free Unit Converters: USD to INR, Length, Weight & More

Free unit converters for length, weight, currency and more

Whether you are checking the latest USD to INR rate before a money transfer, doubling a recipe in millilitres, or converting a shipping weight from kilograms to pounds, this category collects 68 free unit converters in one place. Every tool runs in your browser. There is nothing to install, no account to create, and no limit on how many conversions you run. You type a number, pick your units, and read the answer instantly.

The collection covers the everyday measurement problems people actually face: distance and height, body weight and shipping weight, oven temperatures, drink and fuel volumes, road speeds, land and floor area, file and disk sizes, time zones, and live currency exchange. If you have ever opened a search tab just to convert one number, these tools save you the trip. They are built for students, travellers, cooks, freelancers billing overseas clients, engineers, and anyone who works across the metric and imperial systems.

Because everything is browser-based, the converters work the same on a phone, tablet, or laptop. Nothing you type is stored, and the math happens on your device, so the results are fast and private. Bookmark the ones you use most and treat this page as your jumping-off point.

What these unit converters do and when to use them

A unit converter takes a quantity expressed in one unit and restates it in another using a fixed, known ratio. Twelve inches is always one foot; one kilometre is always 0.621 miles. The arithmetic is simple, but doing it by hand is where errors creep in, especially with temperature (which needs a formula, not just a multiplier) and currency (where the rate moves every day).

Reach for these tools when you are reading instructions or data that use a measurement system you do not think in. A European recipe in grams, an American thermostat in Fahrenheit, a German autobahn sign in km/h, a hard drive spec in terabytes, an invoice in euros — each is a conversion away from something familiar. The converters also help in the other direction: presenting your own numbers in the units your audience expects, which matters for resumes, product listings, scientific reports, and quotes for international clients.

They are not a replacement for judgement. A converter tells you that 100 km/h is about 62 mph; it will not tell you the local speed limit. Use them for the math and keep the context in your head.

The full unit converter directory

Below is every tool in this category, grouped by what it measures. The broad "general" converters handle dozens of units in a single interface, while the dedicated pairs (like kg to lbs) give you a focused, no-fuss page for the conversions people search for most.

General-purpose and engineering converters

These handle many units at once and cover specialist measurements you will not find in the simple pairs.

• Length Converter — switch between mm, cm, m, km, inches, feet, yards, and miles in one place.
• Weight Converter — grams, kilograms, ounces, pounds, stones, and tonnes side by side.
• Temperature Converter — Celsius, Fahrenheit, and Kelvin with the formulas handled for you.
• Area Converter — square metres, square feet, acres, hectares, and more.
• Volume Converter — litres, millilitres, gallons, cups, and fluid ounces together.
• Speed Converter — mph, km/h, knots, and metres per second.
• Time Converter — seconds, minutes, hours, days, and weeks.
• Byte/Bit Converter — bits, bytes, and every binary multiple up to terabytes.
• Power Converter — watts, kilowatts, and horsepower.
• Electric / Voltage Converter — volts, millivolts, and kilovolts for electrical work.
• Pressure Converter — pascals, bar, psi, and atmospheres.
• Torque Converter — newton-metres, foot-pounds, and inch-pounds.

Length and distance

Heights, screen sizes, running distances, and travel — the most common reasons people cross between metric and imperial.

• Centimeters to Inches Converter — for screen sizes, fabric, and height.
• Inches to Centimeters Converter — the reverse, for metric paperwork.
• Millimeters to Inches Converter — handy for hardware and crafts.
• Meters to Feet Converter — rooms, depths, and altitudes.
• Feet to Meters Converter — the imperial-to-metric flip.
• Kilometers to Miles Converter — road trips and race distances.
• Miles to Kilometers Converter — for maps and odometers abroad.

Weight and mass

Body weight, parcels, groceries, and gym plates all live here.

• Kilograms to Pounds Converter — the go-to for body weight and luggage.
• Pounds to Kilograms Converter — for metric forms and shipping.
• Grams to Ounces Converter — cooking and postage.
• Ounces to Grams Converter — the kitchen reverse.
• Ounces to Pounds Converter — bulk weights and packaging.
• Pounds to Ounces Converter — breaking a pound into smaller units.
• Stones to Pounds Converter — common in UK body-weight readings.
• Pounds to Stones Converter — the reverse, for UK scales.

Temperature

Weather, cooking, and science — the three places a few degrees really matter.

• Celsius to Fahrenheit Converter — for US weather and ovens.
• Fahrenheit to Celsius Converter — the metric reverse.
• Celsius to Kelvin Converter — for physics and chemistry.
• Kelvin to Celsius Converter — back to everyday degrees.
• Fahrenheit to Kelvin Converter — imperial straight to absolute.
• Kelvin to Fahrenheit Converter — the reverse for lab work.

Volume and capacity

Recipes, fuel, and drinks, with the cup-versus-millilitre confusion solved.

• Liters to Gallons Converter — fuel and large containers.
• Gallons to Liters Converter — the metric flip.
• Fluid Ounces to Milliliters Converter — drinks and dosing.
• Milliliters to Fluid Ounces Converter — the reverse for US recipes.
• Cups to Milliliters Converter — baking made precise.
• Milliliters to Cups Converter — metric back to cups.

Speed

Driving, cycling, sailing, and aviation.

• MPH to KPH Converter — US speeds to metric.
• KPH to MPH Converter — the reverse for US drivers abroad.
• Knots to MPH Converter — boating and weather wind speeds.
• Knots to KPH Converter — knots into metric road speed.

Area and land

Floor plans, gardens, farms, and property listings.

• Square Feet to Square Meters Converter — floor area in metric.
• Square Meters to Square Feet Converter — the imperial reverse.
• Hectares to Acres Converter — farmland and large plots.
• Acres to Hectares Converter — back to metric land units.
• Square Yards to Square Meters Converter — fabric, carpet, and yards.
• Square Meters to Square Yards Converter — metric back to yards.

Data and storage

File sizes, downloads, and disk capacity, with the binary multiples done for you.

• KB to MB Converter — small files into megabytes.
• MB to GB Converter — downloads and media libraries.
• GB to TB Converter — drive and cloud capacity.
• MB to KB Converter — the reverse for fine detail.
• GB to MB Converter — breaking gigabytes down.
• TB to GB Converter — terabytes into gigabytes.
• Bytes to KB Converter — raw byte counts into kilobytes.

Currency and exchange rates

Live rates for travel, online shopping, remittances, and invoicing overseas clients. Start with the general Currency Converter for any pair, or jump straight to the pages below for the most-searched routes.

• USD to INR — Dollar to Rupee Converter — the most-watched remittance route to India.
• INR to USD — Rupee to Dollar Converter — the reverse, for earnings sent home.
• EUR to USD — Euro to Dollar Converter — the world's busiest currency pair.
• USD to EUR — Dollar to Euro Converter — the dollar-to-euro side.
• GBP to USD — Pound to Dollar Converter — sterling into dollars.
• USD to GBP — Dollar to Pound Converter — the reverse for UK purchases.
• USD to CAD — Dollar to Canadian Dollar Converter — cross-border North American trade.
• USD to AUD — Dollar to Australian Dollar Converter — dollars to the Aussie dollar.
• USD to PKR — Dollar to Pakistani Rupee Converter — a popular remittance route.
• USD to AED — Dollar to Dirham Converter — Gulf travel and trade.

Time and time zones

Scheduling across regions and converting time spans.

• Time Zone Converter — line up meeting times across cities.

How to use these converters: a practical workflow

The tools are deliberately simple, but a little method makes them faster and more reliable.

1. Pick the right tool. If you know your exact pair — say, kilograms to pounds — use the dedicated page. If you are juggling several units, open a general converter like the Length Converter instead.
2. Type the value. Enter the number you have, including decimals. Most pages update the result as you type.
3. Confirm the direction. Double-check which unit is the input and which is the output. The biggest mistakes come from converting the wrong way.
4. Read and sanity-check. Glance at the result and ask whether it feels right. A person who is "70 kg" should land near 154 lbs, not 7 or 700.
5. Copy or note it. Take the figure into your recipe, invoice, or form. For money, jot down the rate and the date you used.

For anything financial, treat the output as a snapshot. A USD to INR figure is accurate the moment you check it, but rates move, so re-check right before you transfer or buy.

Benefits of browser-based unit conversion

Doing conversions here instead of in your head or on a calculator pays off in a few ways.

• Speed. One tab, one number, an instant answer. No app store, no sign-up screen.
• Accuracy. The ratios and temperature formulas are built in, so you skip the off-by-a-decimal slips that plague mental math.
• Privacy. The math runs in your browser. Your numbers are not uploaded or saved.
• Always available. Works on any device with a browser, online, on the same page you bookmarked last week.
• Free, with no catch. Every converter is free and unlimited. There is no premium tier hiding the answer.
• Consistency. Using the same trusted tool every time means your conversions match across documents and projects.

Common mistakes and limitations

Converters are reliable, but a few traps catch people out:

• Converting the wrong direction. Inches-to-cm and cm-to-inches give very different numbers. Read the labels before you trust the result.
• Confusing weight and volume. A cup of flour and a cup of water weigh different amounts. Volume tools convert volume, not mass — do not expect grams from a millilitre tool for a thick ingredient.
• Mixing up US and imperial gallons. A US gallon is smaller than a UK gallon. The same caution applies to fluid ounces. Know which standard your source uses.
• Treating currency rates as fixed. Exchange rates change constantly, and the mid-market rate you see here is not always the rate your bank or transfer service charges after fees.
• Rounding too early. If a result feeds into more math, keep the decimals until the final step.
• Decimal binary confusion. Storage devices are often sold in decimal gigabytes while operating systems report binary ones, so a "1 TB" drive can show as less. The data converters help you see both pictures.

Expert tips

A handful of habits will make you quicker and more confident:

• Memorise a few anchor conversions for instant sanity checks: 1 inch is 2.54 cm, 1 kg is about 2.2 lbs, 0°C is 32°F, and 100 km/h is roughly 62 mph.
• For recipes, convert by weight when you can. The Grams to Ounces Converter beats cup conversions for accuracy because grams do not depend on how tightly you pack the ingredient.
• When billing international clients, lock the EUR to USD or relevant rate on your invoice date and note it, so both sides agree on the figure later.
• Bookmark your two or three most-used pages directly. Going straight to the Celsius to Fahrenheit Converter beats searching every time.
• For travel, pre-convert the local speed limits and a few common prices before you go, using the KPH to MPH Converter and a currency page, so you are not fumbling on the road.
• Pair tools when a job needs two steps. Convert a parcel's pounds to kilograms for the carrier, then its centimetres to inches for a customs form, in two quick tabs.

Related guides and categories

Want the background behind the numbers? These guides go deeper on the conversions people search for most:

• USD to INR — how the dollar-rupee rate moves and what it means for transfers.
• EUR to USD currency — reading the world's most-traded pair.
• GBP pounds to USD — converting sterling sensibly.
• Meter to feet — the metric-imperial height guide.
• 80 kg to lbs — a worked example for body weight.
• cm to feet — turning centimetres into feet and inches.

Exploring the rest of the toolbox? These related categories pair well with the converters:

• Online Calculators — percentages, loans, BMI, and everyday math.
• Binary Converters — number-base and encoding conversions for developers.
• Text Analysis Tools — word counts, readability, and case tools.
• Online PDF Tools — merge, split, and compress documents.
• Image Tools — resize, crop, and convert images.
• Developer Tools — formatters, encoders, and generators.

Frequently asked questions

Are these unit converters really free?

Yes. Every converter in this category is free to use with no sign-up, no install, and no usage limit. You can run as many conversions as you like, and there is no premium tier hiding the result behind a paywall.

How accurate is the USD to INR converter?

The USD to INR converter uses current market exchange rates, so it is accurate to the moment you check it. Rates change throughout the day, though, and banks or transfer services may apply their own margins and fees, so the amount you actually receive can differ slightly from the mid-market figure shown.

Do I need to install anything or create an account?

No. The tools are entirely browser-based. You open the page, type your number, and read the answer. Nothing is downloaded to your device and no account is required.

Is my data private when I use these tools?

The conversions run in your browser, so the values you type are not uploaded or stored on a server. That keeps your numbers private, whether you are converting a salary, a body weight, or a confidential file size.

Which converter should I use for body weight?

For body weight, the Kilograms to Pounds Converter and the Pounds to Kilograms Converter are the quickest. In the UK, the Stones to Pounds Converter is also useful since scales there often read in stones.

What is the difference between the general converters and the dedicated pages?

General tools like the Length Converter or Weight Converter handle many units in a single interface, which is ideal when you are juggling several at once. Dedicated pages such as Meters to Feet focus on one common pair for a faster, distraction-free conversion.

Why does my 1 TB hard drive show less than 1 TB of space?

Drive makers usually advertise capacity in decimal terabytes (1 TB = 1,000,000,000,000 bytes) while operating systems often count in binary terabytes, which are larger. The reported space looks smaller as a result. The GB to TB Converter and TB to GB Converter let you see how the numbers line up.

Can I convert temperatures for cooking?

Yes. The Celsius to Fahrenheit Converter and Fahrenheit to Celsius Converter handle the formula for you, so an oven set in one system is easy to read in the other. For ingredients, the volume and weight converters cover cups, millilitres, grams, and ounces.

Do the currency converters work for any pair?

The general Currency Converter handles a wide range of currencies, and dedicated pages cover the busiest routes like EUR to USD, GBP to USD, and USD to CAD. Pick the dedicated page when it exists for the cleanest experience, or the general tool for anything less common.