diff --git a/calculator1.rb b/calculator1.rb
new file mode 100644
index 0000000..1cfdeae
--- /dev/null
+++ b/calculator1.rb
@@ -0,0 +1,79 @@
+# ******************
+# Stage 1 Calculator
+# ******************
+
+# Method for calculator
+def calculator(operation, num1, num2)
+
+  # Variables created for each calculation type
+  result_add = num1 + num2
+  result_subtract = num1 - num2
+  result_multiply = num1 * num2
+  result_divide = num1 / num2
+  result_exponent = num1 ** num2
+  result_module = num1 % num2
+
+  # Output based on operation type
+  if operation == "+" || operation == "add"
+    puts "#{num1} + #{num2} = #{result_add}"
+  elsif operation == "-" || operation == "subtract"
+    puts "#{num1} - #{num2} = #{result_subtract}"
+  elsif operation == "*" || operation == "multiply"
+    puts "#{num1} * #{num2} = #{result_multiply}"
+  elsif operation == "/" || operation == "divide"
+    # Divide by 0 output
+    if num1 == 0 || num2 == 0
+      puts "Dividing by zero is undefined!"
+    else
+      puts "#{num1} / #{num2} = #{result_divide}"
+    end
+  elsif operation == "^" || operation == "exponent"
+    puts "#{num1} ^ #{num2} = #{result_exponent}"
+  elsif operation == "%" || operation == "module"
+    puts "#{num1} % #{num2} = #{result_module}"
+  else
+    # Error message, just in case
+    puts "Hey! How'd this glitch happen?"
+  end
+end
+
+puts "------------------"
+puts "Let's do some math"
+puts "------------------\n\n"
+
+# Operation options stored in array for the until loop to scan over
+operator_types = ["+", "add", "-", "subtract", "*", "multiply", "/", "divide", "^", "exponent", "%", "module"]
+
+x = ""
+
+# Until true, gets.chomp is a string that matches the array
+until operator_types.include? x
+puts "Would you like to add(+), subtract(-), multiply(*), divide(/), exponent(^), or module(%)?"
+x = gets.chomp.downcase
+user_operator = x
+end
+
+# Checks if gets is a float (integers work) retries until it is
+puts "Please enter the first number:"
+begin
+user_num1 = Float(gets)
+rescue ArgumentError
+  puts "Try again"
+retry
+end
+
+puts "Please enter the second number:"
+begin
+user_num2 = Float(gets)
+rescue ArgumentError
+  puts "Try again"
+retry
+end
+
+# Runs method with user inputs
+puts "\n"
+calculator(user_operator, user_num1, user_num2)
+
+puts "\n------------------"
+puts "Calc-U-Later!"
+puts "------------------"